77505446404 has 9 divisors (see below), whose sum is σ = 135635505607. Its totient is φ = 38752444804.

The previous prime is 77505446393. The next prime is 77505446443. The reversal of 77505446404 is 40464450577.

The square root of 77505446404 is 278398.

It is a perfect power (a square), and thus also a powerful number.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 487197 + ... + 626395.

Almost surely, 2^77505446404 is an apocalyptic number.

77505446404 is the 278398-th square number.

It is an amenable number.

77505446404 is a deficient number, since it is larger than the sum of its proper divisors (58130059203).

77505446404 is an frugal number, since it uses more digits than its factorization.

77505446404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 278402 (or 139201 counting only the distinct ones).

The product of its (nonzero) digits is 1881600, while the sum is 46.

The spelling of 77505446404 in words is "seventy-seven billion, five hundred five million, four hundred forty-six thousand, four hundred four".