77405056 has 16 divisors (see below), whose sum is σ = 154205640. Its totient is φ = 38702464.

The previous prime is 77405023. The next prime is 77405057. The reversal of 77405056 is 65050477.

It is a tau number, because it is divible by the number of its divisors (16).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77405057) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 302236 + ... + 302491.

Almost surely, 2^77405056 is an apocalyptic number.

It is an amenable number.

77405056 is a deficient number, since it is larger than the sum of its proper divisors (76800584).

77405056 is an equidigital number, since it uses as much as digits as its factorization.

77405056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 604741 (or 604729 counting only the distinct ones).

The product of its (nonzero) digits is 29400, while the sum is 34.

The square root of 77405056 is about 8798.0143214250. The cubic root of 77405056 is about 426.1767727941.

The spelling of 77405056 in words is "seventy-seven million, four hundred five thousand, fifty-six".