61556502 has 32 divisors (see below), whose sum is σ = 145555200. Its totient is φ = 16980768.

The previous prime is 61556501. The next prime is 61556513. The reversal of 61556502 is 20565516.

It is a self number, because there is not a number n which added to its sum of digits gives 61556502.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61556501) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24052 + ... + 26487.

It is an arithmetic number, because the mean of its divisors is an integer number (4548600).

Almost surely, 2^61556502 is an apocalyptic number.

61556502 is an abundant number, since it is smaller than the sum of its proper divisors (83998698).

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

61556502 is a wasteful number, since it uses less digits than its factorization.

61556502 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50580.

The product of its (nonzero) digits is 9000, while the sum is 30.

The square root of 61556502 is about 7845.7951795850. The cubic root of 61556502 is about 394.8431829575.

The spelling of 61556502 in words is "sixty-one million, five hundred fifty-six thousand, five hundred two".