77903611331 has 24 divisors (see below), whose sum is σ = 97941068064. Its totient is φ = 61418528640.

The previous prime is 77903611309. The next prime is 77903611339. The reversal of 77903611331 is 13311630977.

It is not a de Polignac number, because 77903611331 - 2²² = 77899417027 is a prime.

It is a super-2 number, since 2×77903611331² (a number of 23 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (41) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (77903611339) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 38615 + ... + 396608.

It is an arithmetic number, because the mean of its divisors is an integer number (4080877836).

Almost surely, 2^77903611331 is an apocalyptic number.

77903611331 is a deficient number, since it is larger than the sum of its proper divisors (20037456733).

77903611331 is a wasteful number, since it uses less digits than its factorization.

77903611331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 435531 (or 435524 counting only the distinct ones).

The product of its (nonzero) digits is 71442, while the sum is 41.

The spelling of 77903611331 in words is "seventy-seven billion, nine hundred three million, six hundred eleven thousand, three hundred thirty-one".