61553825 has 12 divisors (see below), whose sum is σ = 80344560. Its totient is φ = 46650960.

The previous prime is 61553801. The next prime is 61553831. The reversal of 61553825 is 52835516.

It is a de Polignac number, because none of the positive numbers 2^k-61553825 is a prime.

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, 64319 + ... + 65268.

It is an arithmetic number, because the mean of its divisors is an integer number (6695380).

Almost surely, 2^61553825 is an apocalyptic number.

It is an amenable number.

61553825 is a deficient number, since it is larger than the sum of its proper divisors (18790735).

61553825 is a wasteful number, since it uses less digits than its factorization.

61553825 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129616 (or 129611 counting only the distinct ones).

The product of its digits is 36000, while the sum is 35.

The square root of 61553825 is about 7845.6245767944. The cubic root of 61553825 is about 394.8374591618.

The spelling of 61553825 in words is "sixty-one million, five hundred fifty-three thousand, eight hundred twenty-five".