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BaseRepresentation
bin111101010001001111010…
…0010000000110110101001
31002211000112201120120000100
41322202132202000312221
52100431242134213211
625524243214300013
71526245110513300
oct172423642006651
932730481516010
108420795616681
11275726a6611a8
12b4000b4b7609
134911016b6b16
142117d6671437
15e909e388156
hex7a89e880da9

8420795616681 has 144 divisors (see below), whose sum is σ = 14961623476800. Its totient is φ = 4537946198016.

The previous prime is 8420795616619. The next prime is 8420795616691. The reversal of 8420795616681 is 1866165970248.

8420795616681 is a `hidden beast` number, since 8 + 4 + 2 + 0 + 7 + 9 + 5 + 616 + 6 + 8 + 1 = 666.

It is not a de Polignac number, because 8420795616681 - 26 = 8420795616617 is a prime.

It is a super-2 number, since 2×84207956166812 (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is not an unprimeable number, because it can be changed into a prime (8420795616691) by changing a digit.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 2657239065 + ... + 2657242233.

Almost surely, 28420795616681 is an apocalyptic number.

It is an amenable number.

8420795616681 is a deficient number, since it is larger than the sum of its proper divisors (6540827860119).

8420795616681 is a wasteful number, since it uses less digits than its factorization.

8420795616681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4548 (or 4538 counting only the distinct ones).

The product of its (nonzero) digits is 34836480, while the sum is 63.

The spelling of 8420795616681 in words is "eight trillion, four hundred twenty billion, seven hundred ninety-five million, six hundred sixteen thousand, six hundred eighty-one".