61532590 has 32 divisors (see below), whose sum is σ = 132088320. Its totient is φ = 20179104.

The previous prime is 61532587. The next prime is 61532609. The reversal of 61532590 is 9523516.

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, 17500 + ... + 20719.

It is an arithmetic number, because the mean of its divisors is an integer number (4127760).

Almost surely, 2^61532590 is an apocalyptic number.

61532590 is an abundant number, since it is smaller than the sum of its proper divisors (70555730).

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

61532590 is a wasteful number, since it uses less digits than its factorization.

61532590 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38256.

The product of its (nonzero) digits is 8100, while the sum is 31.

The square root of 61532590 is about 7844.2711579853. The cubic root of 61532590 is about 394.7920499188.

The spelling of 61532590 in words is "sixty-one million, five hundred thirty-two thousand, five hundred ninety".