77516404 has 24 divisors (see below), whose sum is σ = 158816448. Its totient is φ = 32410560.

The previous prime is 77516393. The next prime is 77516407. The reversal of 77516404 is 40461577.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 77516404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77516407) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32614 + ... + 34909.

It is an arithmetic number, because the mean of its divisors is an integer number (6617352).

Almost surely, 2^77516404 is an apocalyptic number.

It is an amenable number.

77516404 is an abundant number, since it is smaller than the sum of its proper divisors (81300044).

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

77516404 is a wasteful number, since it uses less digits than its factorization.

77516404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67575 (or 67573 counting only the distinct ones).

The product of its (nonzero) digits is 23520, while the sum is 34.

The square root of 77516404 is about 8804.3400661265. The cubic root of 77516404 is about 426.3810281644.

The spelling of 77516404 in words is "seventy-seven million, five hundred sixteen thousand, four hundred four".