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681001737894 = 232109347095687
BaseRepresentation
bin10011110100011101101…
…11011101111010100110
32102002210011220200112200
421322032313131322212
542124142421103034
61240503050355330
7100125600156162
oct11721667357246
92362704820480
10681001737894
112428a1800135
12abb9612bb46
134c2ab48a52a
1424d6409dca2
1512aab262a99
hex9e8edddea6

681001737894 has 24 divisors (see below), whose sum is σ = 1489040501520. Its totient is φ = 224918004528.

The previous prime is 681001737887. The next prime is 681001737901. The reversal of 681001737894 is 498737100186.

It is an interprime number because it is at equal distance from previous prime (681001737887) and next prime (681001737901).

It is a self number, because there is not a number n which added to its sum of digits gives 681001737894.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 173545882 + ... + 173549805.

It is an arithmetic number, because the mean of its divisors is an integer number (62043354230).

Almost surely, 2681001737894 is an apocalyptic number.

681001737894 is an abundant number, since it is smaller than the sum of its proper divisors (808038763626).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

681001737894 is a wasteful number, since it uses less digits than its factorization.

681001737894 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 347095804 (or 347095801 counting only the distinct ones).

The product of its (nonzero) digits is 2032128, while the sum is 54.

The spelling of 681001737894 in words is "six hundred eighty-one billion, one million, seven hundred thirty-seven thousand, eight hundred ninety-four".

Divisors: 1 2 3 6 9 18 109 218 327 654 981 1962 347095687 694191374 1041287061 2082574122 3123861183 6247722366 37833429883 75666859766 113500289649 227000579298 340500868947 681001737894