77044472337040 has 80 divisors (see below), whose sum is σ = 193112510852016. Its totient is φ = 28416958617600.

The previous prime is 77044472337037. The next prime is 77044472337047. The reversal of 77044472337040 is 4073327444077.

It can be written as a sum of positive squares in 8 ways, for example, as 4177625317776 + 72866847019264 = 2043924^2 + 8536208^2 .

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (52).

It is not an unprimeable number, because it can be changed into a prime (77044472337047) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 38384391 + ... + 40341670.

Almost surely, 2^{77044472337040} is an apocalyptic number.

It is an amenable number.

77044472337040 is an abundant number, since it is smaller than the sum of its proper divisors (116068038514976).

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

77044472337040 is a wasteful number, since it uses less digits than its factorization.

77044472337040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78727028 (or 78727022 counting only the distinct ones).

The product of its (nonzero) digits is 11063808, while the sum is 52.

The spelling of 77044472337040 in words is "seventy-seven trillion, forty-four billion, four hundred seventy-two million, three hundred thirty-seven thousand, forty".