61057556 has 12 divisors (see below), whose sum is σ = 122115168. Its totient is φ = 26167512.

The previous prime is 61057519. The next prime is 61057567. The reversal of 61057556 is 65575016.

61057556 is an admirable number.

It is a hoax number, since the sum of its digits (35) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1090286 + ... + 1090341.

It is an arithmetic number, because the mean of its divisors is an integer number (10176264).

Almost surely, 2^61057556 is an apocalyptic number.

It is an amenable number.

61057556 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

61057556 is a wasteful number, since it uses less digits than its factorization.

61057556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2180638 (or 2180636 counting only the distinct ones).

The product of its (nonzero) digits is 31500, while the sum is 35.

The square root of 61057556 is about 7813.9334524937. The cubic root of 61057556 is about 393.7734876054.

The spelling of 61057556 in words is "sixty-one million, fifty-seven thousand, five hundred fifty-six".