77840080044 has 96 divisors (see below), whose sum is σ = 190225846272. Its totient is φ = 24744960000.

The previous prime is 77840080033. The next prime is 77840080067. The reversal of 77840080044 is 44008004877.

It is a super-2 number, since 2×77840080044² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 77840079978 and 77840080005.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8691769 + ... + 8700719.

It is an arithmetic number, because the mean of its divisors is an integer number (1981519232).

Almost surely, 2^77840080044 is an apocalyptic number.

It is an amenable number.

77840080044 is an abundant number, since it is smaller than the sum of its proper divisors (112385766228).

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

77840080044 is a wasteful number, since it uses less digits than its factorization.

77840080044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9327 (or 9325 counting only the distinct ones).

The product of its (nonzero) digits is 200704, while the sum is 42.

The spelling of 77840080044 in words is "seventy-seven billion, eight hundred forty million, eighty thousand, forty-four".