77707701538 has 32 divisors (see below), whose sum is σ = 118366272000. Its totient is φ = 38256366720.

The previous prime is 77707701517. The next prime is 77707701559. The reversal of 77707701538 is 83510770777.

It is an interprime number because it is at equal distance from previous prime (77707701517) and next prime (77707701559).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 73239528 + ... + 73240588.

It is an arithmetic number, because the mean of its divisors is an integer number (3698946000).

Almost surely, 2^77707701538 is an apocalyptic number.

77707701538 is a deficient number, since it is larger than the sum of its proper divisors (40658570462).

77707701538 is a wasteful number, since it uses less digits than its factorization.

77707701538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2490.

The product of its (nonzero) digits is 2016840, while the sum is 52.

The spelling of 77707701538 in words is "seventy-seven billion, seven hundred seven million, seven hundred one thousand, five hundred thirty-eight".