77642555316 has 24 divisors (see below), whose sum is σ = 181180985664. Its totient is φ = 25878705600.

The previous prime is 77642555299. The next prime is 77642555321. The reversal of 77642555316 is 61355524677.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 113985 + ... + 410216.

It is an arithmetic number, because the mean of its divisors is an integer number (7549207736).

Almost surely, 2^77642555316 is an apocalyptic number.

It is an amenable number.

77642555316 is an abundant number, since it is smaller than the sum of its proper divisors (103538430348).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

77642555316 is a wasteful number, since it uses less digits than its factorization.

77642555316 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 536551 (or 536549 counting only the distinct ones).

The product of its digits is 5292000, while the sum is 51.

The spelling of 77642555316 in words is "seventy-seven billion, six hundred forty-two million, five hundred fifty-five thousand, three hundred sixteen".