77009394044 has 24 divisors (see below), whose sum is σ = 147025124400. Its totient is φ = 35002558080.

The previous prime is 77009394017. The next prime is 77009394071. The reversal of 77009394044 is 44049390077.

It is an interprime number because it is at equal distance from previous prime (77009394017) and next prime (77009394071).

It is a self number, because there is not a number n which added to its sum of digits gives 77009394044.

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, 1459922 + ... + 1511750.

It is an arithmetic number, because the mean of its divisors is an integer number (6126046850).

Almost surely, 2^77009394044 is an apocalyptic number.

It is an amenable number.

77009394044 is a deficient number, since it is larger than the sum of its proper divisors (70015730356).

77009394044 is a wasteful number, since it uses less digits than its factorization.

77009394044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85613 (or 85611 counting only the distinct ones).

The product of its (nonzero) digits is 762048, while the sum is 47.

The spelling of 77009394044 in words is "seventy-seven billion, nine million, three hundred ninety-four thousand, forty-four".