77505137008 has 40 divisors (see below), whose sum is σ = 163995191136. Its totient is φ = 35267769600.

The previous prime is 77505136997. The next prime is 77505137029. The reversal of 77505137008 is 80073150577.

It is a hoax number, since the sum of its digits (43) coincides with the sum of the digits of its distinct prime factors.

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, 2609323 + ... + 2638858.

Almost surely, 2^77505137008 is an apocalyptic number.

It is an amenable number.

77505137008 is an abundant number, since it is smaller than the sum of its proper divisors (86490054128).

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

77505137008 is a wasteful number, since it uses less digits than its factorization.

77505137008 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5248273 (or 5248267 counting only the distinct ones).

The product of its (nonzero) digits is 205800, while the sum is 43.

The spelling of 77505137008 in words is "seventy-seven billion, five hundred five million, one hundred thirty-seven thousand, eight".