61525664 has 12 divisors (see below), whose sum is σ = 121128714. Its totient is φ = 30762816.

The previous prime is 61525649. The next prime is 61525687. The reversal of 61525664 is 46652516.

61525664 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 32581264 + 28944400 = 5708^2 + 5380^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 961307 + ... + 961370.

Almost surely, 2^61525664 is an apocalyptic number.

It is an amenable number.

61525664 is a deficient number, since it is larger than the sum of its proper divisors (59603050).

61525664 is a wasteful number, since it uses less digits than its factorization.

61525664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1922687 (or 1922679 counting only the distinct ones).

The product of its digits is 43200, while the sum is 35.

The square root of 61525664 is about 7843.8296768862. The cubic root of 61525664 is about 394.7772369970. Note that the first 3 decimals are identical.

The spelling of 61525664 in words is "sixty-one million, five hundred twenty-five thousand, six hundred sixty-four".