77131559008 has 48 divisors (see below), whose sum is σ = 173570783904. Its totient is φ = 33051663360.

The previous prime is 77131558991. The next prime is 77131559023. The reversal of 77131559008 is 80095513177.

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, 1874916 + ... + 1915612.

It is an arithmetic number, because the mean of its divisors is an integer number (3616057998).

Almost surely, 2^77131559008 is an apocalyptic number.

It is an amenable number.

77131559008 is an abundant number, since it is smaller than the sum of its proper divisors (96439224896).

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

77131559008 is a wasteful number, since it uses less digits than its factorization.

77131559008 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49175 (or 49167 counting only the distinct ones).

The product of its (nonzero) digits is 264600, while the sum is 46.

The spelling of 77131559008 in words is "seventy-seven billion, one hundred thirty-one million, five hundred fifty-nine thousand, eight".