61631874 has 32 divisors (see below), whose sum is σ = 137335680. Its totient is φ = 20487600.

The previous prime is 61631863. The next prime is 61631903. The reversal of 61631874 is 47813616.

61631874 is a `hidden beast` number, since 616 + 31 + 8 + 7 + 4 = 666.

61631874 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21379 + ... + 24089.

It is an arithmetic number, because the mean of its divisors is an integer number (4291740).

Almost surely, 2^61631874 is an apocalyptic number.

61631874 is an abundant number, since it is smaller than the sum of its proper divisors (75703806).

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

61631874 is a wasteful number, since it uses less digits than its factorization.

61631874 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3143 (or 3137 counting only the distinct ones).

The product of its digits is 24192, while the sum is 36.

The square root of 61631874 is about 7850.5970473589. The cubic root of 61631874 is about 395.0042706369.

The spelling of 61631874 in words is "sixty-one million, six hundred thirty-one thousand, eight hundred seventy-four".