61656364 has 24 divisors (see below), whose sum is σ = 134523648. Its totient is φ = 24021840.

The previous prime is 61656347. The next prime is 61656373. The reversal of 61656364 is 46365616.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 99784 + ... + 100399.

It is an arithmetic number, because the mean of its divisors is an integer number (5605152).

Almost surely, 2^61656364 is an apocalyptic number.

It is an amenable number.

61656364 is an abundant number, since it is smaller than the sum of its proper divisors (72867284).

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

61656364 is a wasteful number, since it uses less digits than its factorization.

61656364 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 200205 (or 200203 counting only the distinct ones).

The product of its digits is 77760, while the sum is 37.

The square root of 61656364 is about 7852.1566464252. The cubic root of 61656364 is about 395.0565832524.

The spelling of 61656364 in words is "sixty-one million, six hundred fifty-six thousand, three hundred sixty-four".