61725816 has 48 divisors (see below), whose sum is σ = 167848200. Its totient is φ = 20492352.

The previous prime is 61725809. The next prime is 61725821. The reversal of 61725816 is 61852716.

61725816 is a `hidden beast` number, since 6 + 1 + 72 + 581 + 6 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

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, 17775 + ... + 20961.

Almost surely, 2^61725816 is an apocalyptic number.

It is an amenable number.

61725816 is an abundant number, since it is smaller than the sum of its proper divisors (106122384).

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

61725816 is a wasteful number, since it uses less digits than its factorization.

61725816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3468 (or 3461 counting only the distinct ones).

The product of its digits is 20160, while the sum is 36.

The square root of 61725816 is about 7856.5778809861. The cubic root of 61725816 is about 395.2048630205.

The spelling of 61725816 in words is "sixty-one million, seven hundred twenty-five thousand, eight hundred sixteen".