61865158 has 16 divisors (see below), whose sum is σ = 94770000. Its totient is φ = 30279712.

The previous prime is 61865131. The next prime is 61865161. The reversal of 61865158 is 85156816.

It is a self number, because there is not a number n which added to its sum of digits gives 61865158.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30768 + ... + 32716.

It is an arithmetic number, because the mean of its divisors is an integer number (5923125).

Almost surely, 2^61865158 is an apocalyptic number.

61865158 is a deficient number, since it is larger than the sum of its proper divisors (32904842).

61865158 is a wasteful number, since it uses less digits than its factorization.

61865158 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2279.

The product of its digits is 57600, while the sum is 40.

The square root of 61865158 is about 7865.4407378099. The cubic root of 61865158 is about 395.5020225858.

The spelling of 61865158 in words is "sixty-one million, eight hundred sixty-five thousand, one hundred fifty-eight".