61609056 has 24 divisors (see below), whose sum is σ = 161724024. Its totient is φ = 20536320.

The previous prime is 61609049. The next prime is 61609061. The reversal of 61609056 is 65090616.

It is a tau number, because it is divible by the number of its divisors (24).

It is a super-2 number, since 2×61609056² = 7591351562422272, which contains 22 as substring.

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, 320785 + ... + 320976.

It is an arithmetic number, because the mean of its divisors is an integer number (6738501).

Almost surely, 2^61609056 is an apocalyptic number.

It is an amenable number.

61609056 is an abundant number, since it is smaller than the sum of its proper divisors (100114968).

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

61609056 is a wasteful number, since it uses less digits than its factorization.

61609056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 641774 (or 641766 counting only the distinct ones).

The product of its (nonzero) digits is 9720, while the sum is 33.

The square root of 61609056 is about 7849.1436475580. The cubic root of 61609056 is about 394.9555170759.

The spelling of 61609056 in words is "sixty-one million, six hundred nine thousand, fifty-six".