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961904772381 = 3745804989161
BaseRepresentation
bin11011111111101011111…
…11100000010100011101
310101221211210112100110210
431333311333200110131
5111224440110204011
62013520513323033
7126331616442330
oct15776577402435
93357753470423
10961904772381
11340a3a192603
1213650bb66479
136c926a2b137
14347b0c26617
151a04c0d16a6
hexdff5fe051d

961904772381 has 8 divisors (see below), whose sum is σ = 1465759653184. Its totient is φ = 549659869920.

The previous prime is 961904772377. The next prime is 961904772403. The reversal of 961904772381 is 183277409169.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 961904772381 - 22 = 961904772377 is a prime.

It is a super-2 number, since 2×9619047723812 (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (961904772331) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22902494560 + ... + 22902494601.

It is an arithmetic number, because the mean of its divisors is an integer number (183219956648).

Almost surely, 2961904772381 is an apocalyptic number.

It is an amenable number.

961904772381 is a deficient number, since it is larger than the sum of its proper divisors (503854880803).

961904772381 is a wasteful number, since it uses less digits than its factorization.

961904772381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45804989171.

The product of its (nonzero) digits is 4572288, while the sum is 57.

The spelling of 961904772381 in words is "nine hundred sixty-one billion, nine hundred four million, seven hundred seventy-two thousand, three hundred eighty-one".

Divisors: 1 3 7 21 45804989161 137414967483 320634924127 961904772381