61557204 has 24 divisors (see below), whose sum is σ = 152083008. Its totient is φ = 19312000.

The previous prime is 61557203. The next prime is 61557211. The reversal of 61557204 is 40275516.

It is a hoax number, since the sum of its digits (30) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61557203) 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, 150672 + ... + 151079.

It is an arithmetic number, because the mean of its divisors is an integer number (6336792).

Almost surely, 2^61557204 is an apocalyptic number.

It is an amenable number.

61557204 is an abundant number, since it is smaller than the sum of its proper divisors (90525804).

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

61557204 is a wasteful number, since it uses less digits than its factorization.

61557204 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 301775 (or 301773 counting only the distinct ones).

The product of its (nonzero) digits is 8400, while the sum is 30.

The square root of 61557204 is about 7845.8399167967. The cubic root of 61557204 is about 394.8446839030.

The spelling of 61557204 in words is "sixty-one million, five hundred fifty-seven thousand, two hundred four".