77563113915 has 32 divisors (see below), whose sum is σ = 146720378880. Its totient is φ = 34234752384.

The previous prime is 77563113913. The next prime is 77563113919. The reversal of 77563113915 is 51931136577.

It is not a de Polignac number, because 77563113915 - 2¹ = 77563113913 is a prime.

It is not an unprimeable number, because it can be changed into a prime (77563113913) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 12733099 + ... + 12739188.

It is an arithmetic number, because the mean of its divisors is an integer number (4585011840).

Almost surely, 2^77563113915 is an apocalyptic number.

77563113915 is a deficient number, since it is larger than the sum of its proper divisors (69157264965).

77563113915 is a wasteful number, since it uses less digits than its factorization.

77563113915 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25472331.

The product of its digits is 595350, while the sum is 48.

The spelling of 77563113915 in words is "seventy-seven billion, five hundred sixty-three million, one hundred thirteen thousand, nine hundred fifteen".