61545604 has 6 divisors (see below), whose sum is σ = 107704814. Its totient is φ = 30772800.

The previous prime is 61545587. The next prime is 61545619. The reversal of 61545604 is 40654516.

It can be written as a sum of positive squares in only one way, i.e., 51811204 + 9734400 = 7198^2 + 3120^2 .

It is a super-2 number, since 2×61545604² = 7575722743449632, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7693197 + ... + 7693204.

Almost surely, 2^61545604 is an apocalyptic number.

It is an amenable number.

61545604 is a deficient number, since it is larger than the sum of its proper divisors (46159210).

61545604 is a wasteful number, since it uses less digits than its factorization.

61545604 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15386405 (or 15386403 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 31.

The square root of 61545604 is about 7845.1006367031. The cubic root of 61545604 is about 394.8198804910.

The spelling of 61545604 in words is "sixty-one million, five hundred forty-five thousand, six hundred four".