76729634381 has 4 divisors (see below), whose sum is σ = 76752756000. Its totient is φ = 76706512764.

The previous prime is 76729634363. The next prime is 76729634417. The reversal of 76729634381 is 18343692767.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 76729634381 - 2²⁶ = 76662525517 is a prime.

It is a super-2 number, since 2×76729634381² (a number of 23 digits) contains 22 as substring.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (76729634321) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11555831 + ... + 11562468.

It is an arithmetic number, because the mean of its divisors is an integer number (19188189000).

Almost surely, 2^76729634381 is an apocalyptic number.

It is an amenable number.

76729634381 is a deficient number, since it is larger than the sum of its proper divisors (23121619).

76729634381 is a wasteful number, since it uses less digits than its factorization.

76729634381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23121618.

The product of its digits is 9144576, while the sum is 56.

The spelling of 76729634381 in words is "seventy-six billion, seven hundred twenty-nine million, six hundred thirty-four thousand, three hundred eighty-one".