61631592 has 96 divisors (see below), whose sum is σ = 178432800. Its totient is φ = 17677440.

The previous prime is 61631561. The next prime is 61631593. The reversal of 61631592 is 29513616.

It is a happy number.

61631592 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is not an unprimeable number, because it can be changed into a prime (61631593) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 54618 + ... + 55734.

It is an arithmetic number, because the mean of its divisors is an integer number (1858675).

Almost surely, 2^61631592 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 61631592, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (89216400).

61631592 is an abundant number, since it is smaller than the sum of its proper divisors (116801208).

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

61631592 is a wasteful number, since it uses less digits than its factorization.

61631592 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1167 (or 1152 counting only the distinct ones).

The product of its digits is 9720, while the sum is 33.

The square root of 61631592 is about 7850.5790869209. The cubic root of 61631592 is about 395.0036681815.

The spelling of 61631592 in words is "sixty-one million, six hundred thirty-one thousand, five hundred ninety-two".