61557532 has 24 divisors (see below), whose sum is σ = 110602800. Its totient is φ = 29966976.

The previous prime is 61557487. The next prime is 61557533. The reversal of 61557532 is 23575516.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61557533) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24528 + ... + 26920.

It is an arithmetic number, because the mean of its divisors is an integer number (4608450).

Almost surely, 2^61557532 is an apocalyptic number.

It is an amenable number.

61557532 is a deficient number, since it is larger than the sum of its proper divisors (49045268).

61557532 is a wasteful number, since it uses less digits than its factorization.

61557532 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2565 (or 2563 counting only the distinct ones).

The product of its digits is 31500, while the sum is 34.

The square root of 61557532 is about 7845.8608195659. The cubic root of 61557532 is about 394.8453851955.

The spelling of 61557532 in words is "sixty-one million, five hundred fifty-seven thousand, five hundred thirty-two".