77815535116 has 72 divisors (see below), whose sum is σ = 150642652160. Its totient is φ = 35144604000.

The previous prime is 77815535071. The next prime is 77815535117. The reversal of 77815535116 is 61153551877.

It is a self number, because there is not a number n which added to its sum of digits gives 77815535116.

It is not an unprimeable number, because it can be changed into a prime (77815535117) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 74894125 + ... + 74895163.

Almost surely, 2^77815535116 is an apocalyptic number.

It is an amenable number.

77815535116 is a deficient number, since it is larger than the sum of its proper divisors (72827117044).

77815535116 is a wasteful number, since it uses less digits than its factorization.

77815535116 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1907 (or 1894 counting only the distinct ones).

The product of its digits is 882000, while the sum is 49.

The spelling of 77815535116 in words is "seventy-seven billion, eight hundred fifteen million, five hundred thirty-five thousand, one hundred sixteen".