76742865981 has 48 divisors (see below), whose sum is σ = 118881060480. Its totient is φ = 47581015680.

The previous prime is 76742865949. The next prime is 76742865989. The reversal of 76742865981 is 18956824767.

76742865981 is a `hidden beast` number, since 7 + 67 + 428 + 65 + 98 + 1 = 666.

It is not a de Polignac number, because 76742865981 - 2⁵ = 76742865949 is a prime.

It is a super-2 number, since 2×76742865981² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (76742865989) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 14786935 + ... + 14792123.

It is an arithmetic number, because the mean of its divisors is an integer number (2476688760).

Almost surely, 2^76742865981 is an apocalyptic number.

It is an amenable number.

76742865981 is a deficient number, since it is larger than the sum of its proper divisors (42138194499).

76742865981 is a wasteful number, since it uses less digits than its factorization.

76742865981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7186 (or 7183 counting only the distinct ones).

The product of its digits is 40642560, while the sum is 63.

The spelling of 76742865981 in words is "seventy-six billion, seven hundred forty-two million, eight hundred sixty-five thousand, nine hundred eighty-one".