61553604 has 36 divisors (see below), whose sum is σ = 167075664. Its totient is φ = 17586576.

The previous prime is 61553599. The next prime is 61553623. The reversal of 61553604 is 40635516.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 51754 + ... + 52929.

Almost surely, 2^61553604 is an apocalyptic number.

It is an amenable number.

61553604 is an abundant number, since it is smaller than the sum of its proper divisors (105522060).

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

61553604 is a wasteful number, since it uses less digits than its factorization.

61553604 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104704 (or 104695 counting only the distinct ones).

The product of its (nonzero) digits is 10800, while the sum is 30.

The square root of 61553604 is about 7845.6104924983. The cubic root of 61553604 is about 394.8369866259.

The spelling of 61553604 in words is "sixty-one million, five hundred fifty-three thousand, six hundred four".