61656372 has 36 divisors (see below), whose sum is σ = 156383136. Its totient is φ = 20482320.

The previous prime is 61656347. The next prime is 61656373. The reversal of 61656372 is 27365616.

61656372 is a `hidden beast` number, since 6 + 16 + 5 + 637 + 2 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61656373) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8443 + ... + 13949.

It is an arithmetic number, because the mean of its divisors is an integer number (4343976).

Almost surely, 2^61656372 is an apocalyptic number.

It is an amenable number.

61656372 is an abundant number, since it is smaller than the sum of its proper divisors (94726764).

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

61656372 is a wasteful number, since it uses less digits than its factorization.

61656372 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5828 (or 5823 counting only the distinct ones).

The product of its digits is 45360, while the sum is 36.

The square root of 61656372 is about 7852.1571558394. The cubic root of 61656372 is about 395.0566003387.

The spelling of 61656372 in words is "sixty-one million, six hundred fifty-six thousand, three hundred seventy-two".