61605856 has 24 divisors (see below), whose sum is σ = 130617144. Its totient is φ = 28433280.

The previous prime is 61605839. The next prime is 61605857. The reversal of 61605856 is 65850616.

It is a Smith number, since the sum of its digits (37) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61605857) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 73630 + ... + 74461.

It is an arithmetic number, because the mean of its divisors is an integer number (5442381).

Almost surely, 2^61605856 is an apocalyptic number.

It is an amenable number.

61605856 is an abundant number, since it is smaller than the sum of its proper divisors (69011288).

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

61605856 is a wasteful number, since it uses less digits than its factorization.

61605856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 148114 (or 148106 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 37.

The square root of 61605856 is about 7848.9398010177. The cubic root of 61605856 is about 394.9486789062.

The spelling of 61605856 in words is "sixty-one million, six hundred five thousand, eight hundred fifty-six".