61533590 has 32 divisors (see below), whose sum is σ = 119754720. Its totient is φ = 22685184.

The previous prime is 61533587. The next prime is 61533607. The reversal of 61533590 is 9533516.

It is a congruent number.

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, 2654 + ... + 11406.

It is an arithmetic number, because the mean of its divisors is an integer number (3742335).

Almost surely, 2^61533590 is an apocalyptic number.

61533590 is a deficient number, since it is larger than the sum of its proper divisors (58221130).

61533590 is a wasteful number, since it uses less digits than its factorization.

61533590 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8816.

The product of its (nonzero) digits is 12150, while the sum is 32.

The square root of 61533590 is about 7844.3348985112. The cubic root of 61533590 is about 394.7941885682.

The spelling of 61533590 in words is "sixty-one million, five hundred thirty-three thousand, five hundred ninety".