77537181516 has 12 divisors (see below), whose sum is σ = 180920090232. Its totient is φ = 25845727168.

The previous prime is 77537181487. The next prime is 77537181551. The reversal of 77537181516 is 61518173577.

It is a tau number, because it is divible by the number of its divisors (12).

It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors.

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 3 ways as a sum of consecutive naturals, for example, 3230715885 + ... + 3230715908.

It is an arithmetic number, because the mean of its divisors is an integer number (15076674186).

Almost surely, 2^77537181516 is an apocalyptic number.

It is an amenable number.

77537181516 is an abundant number, since it is smaller than the sum of its proper divisors (103382908716).

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

77537181516 is a wasteful number, since it uses less digits than its factorization.

77537181516 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6461431800 (or 6461431798 counting only the distinct ones).

The product of its digits is 1234800, while the sum is 51.

The spelling of 77537181516 in words is "seventy-seven billion, five hundred thirty-seven million, one hundred eighty-one thousand, five hundred sixteen".