61568964 has 24 divisors (see below), whose sum is σ = 159623520. Its totient is φ = 20522952.

The previous prime is 61568959. The next prime is 61569017. The reversal of 61568964 is 46986516.

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, 284934 + ... + 285149.

It is an arithmetic number, because the mean of its divisors is an integer number (6650980).

Almost surely, 2^61568964 is an apocalyptic number.

It is an amenable number.

61568964 is an abundant number, since it is smaller than the sum of its proper divisors (98054556).

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

61568964 is a wasteful number, since it uses less digits than its factorization.

61568964 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 570096 (or 570088 counting only the distinct ones).

The product of its digits is 311040, while the sum is 45.

The square root of 61568964 is about 7846.5893227567. The cubic root of 61568964 is about 394.8698262504.

The spelling of 61568964 in words is "sixty-one million, five hundred sixty-eight thousand, nine hundred sixty-four".