77042556 has 24 divisors (see below), whose sum is σ = 199740240. Its totient is φ = 25680816.

The previous prime is 77042551. The next prime is 77042561. The reversal of 77042556 is 65524077.

It is an interprime number because it is at equal distance from previous prime (77042551) and next prime (77042561).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 77042556.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77042551) 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, 356571 + ... + 356786.

It is an arithmetic number, because the mean of its divisors is an integer number (8322510).

Almost surely, 2^77042556 is an apocalyptic number.

It is an amenable number.

77042556 is an abundant number, since it is smaller than the sum of its proper divisors (122697684).

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

77042556 is a wasteful number, since it uses less digits than its factorization.

77042556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 713370 (or 713362 counting only the distinct ones).

The product of its (nonzero) digits is 58800, while the sum is 36.

The square root of 77042556 is about 8777.3889055915. The cubic root of 77042556 is about 425.5104473494.

The spelling of 77042556 in words is "seventy-seven million, forty-two thousand, five hundred fifty-six".