76772013981 has 16 divisors (see below), whose sum is σ = 110283169920. Its totient is φ = 47224416960.

The previous prime is 76772013971. The next prime is 76772014003. The reversal of 76772013981 is 18931027767.

It is not a de Polignac number, because 76772013981 - 2⁹ = 76772013469 is a prime.

It is a super-2 number, since 2×76772013981² (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 (76772013971) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 320521 + ... + 506238.

It is an arithmetic number, because the mean of its divisors is an integer number (6892698120).

Almost surely, 2^76772013981 is an apocalyptic number.

It is an amenable number.

76772013981 is a deficient number, since it is larger than the sum of its proper divisors (33511155939).

76772013981 is a wasteful number, since it uses less digits than its factorization.

76772013981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 829156.

The product of its (nonzero) digits is 889056, while the sum is 51.

The spelling of 76772013981 in words is "seventy-six billion, seven hundred seventy-two million, thirteen thousand, nine hundred eighty-one".