61578764 has 12 divisors (see below), whose sum is σ = 116052384. Its totient is φ = 28420944.

The previous prime is 61578733. The next prime is 61578793. The reversal of 61578764 is 46787516.

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, 592052 + ... + 592155.

It is an arithmetic number, because the mean of its divisors is an integer number (9671032).

Almost surely, 2^61578764 is an apocalyptic number.

It is an amenable number.

61578764 is a deficient number, since it is larger than the sum of its proper divisors (54473620).

61578764 is a wasteful number, since it uses less digits than its factorization.

61578764 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1184224 (or 1184222 counting only the distinct ones).

The product of its digits is 282240, while the sum is 44.

The square root of 61578764 is about 7847.2137730535. The cubic root of 61578764 is about 394.8907757610.

The spelling of 61578764 in words is "sixty-one million, five hundred seventy-eight thousand, seven hundred sixty-four".