77077077444 has 48 divisors (see below), whose sum is σ = 211584139200. Its totient is φ = 24181043328.

The previous prime is 77077077433. The next prime is 77077077457. The reversal of 77077077444 is 44477077077.

It is a Harshad number since it is a multiple of its sum of digits (54).

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 15 ways as a sum of consecutive naturals, for example, 20988654 + ... + 20992325.

It is an arithmetic number, because the mean of its divisors is an integer number (4408002900).

Almost surely, 2^77077077444 is an apocalyptic number.

It is an amenable number.

77077077444 is an abundant number, since it is smaller than the sum of its proper divisors (134507061756).

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

77077077444 is a wasteful number, since it uses less digits than its factorization.

77077077444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41981009 (or 41981001 counting only the distinct ones).

The product of its (nonzero) digits is 7529536, while the sum is 54.

The spelling of 77077077444 in words is "seventy-seven billion, seventy-seven million, seventy-seven thousand, four hundred forty-four".