61556790 has 16 divisors (see below), whose sum is σ = 147736368. Its totient is φ = 16415136.

The previous prime is 61556783. The next prime is 61556791. The reversal of 61556790 is 9765516.

61556790 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61556791) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1025917 + ... + 1025976.

It is an arithmetic number, because the mean of its divisors is an integer number (9233523).

Almost surely, 2^61556790 is an apocalyptic number.

61556790 is an abundant number, since it is smaller than the sum of its proper divisors (86179578).

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

61556790 is a wasteful number, since it uses less digits than its factorization.

61556790 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2051903.

The product of its (nonzero) digits is 56700, while the sum is 39.

The square root of 61556790 is about 7845.8135333438. The cubic root of 61556790 is about 394.8437987314.

The spelling of 61556790 in words is "sixty-one million, five hundred fifty-six thousand, seven hundred ninety".