61568364 has 48 divisors (see below), whose sum is σ = 168779520. Its totient is φ = 17221440.

The previous prime is 61568281. The next prime is 61568371. The reversal of 61568364 is 46386516.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16224 + ... + 19655.

It is an arithmetic number, because the mean of its divisors is an integer number (3516240).

Almost surely, 2^61568364 is an apocalyptic number.

It is an amenable number.

61568364 is an abundant number, since it is smaller than the sum of its proper divisors (107211156).

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

61568364 is a wasteful number, since it uses less digits than its factorization.

61568364 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35910 (or 35908 counting only the distinct ones).

The product of its digits is 103680, while the sum is 39.

The square root of 61568364 is about 7846.5510894915. The cubic root of 61568364 is about 394.8685435550.

The spelling of 61568364 in words is "sixty-one million, five hundred sixty-eight thousand, three hundred sixty-four".