61579494 has 64 divisors (see below), whose sum is σ = 147225600. Its totient is φ = 19017504.

The previous prime is 61579493. The next prime is 61579549. The reversal of 61579494 is 49497516.

61579494 is a `hidden beast` number, since 6 + 157 + 9 + 494 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61579493) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 47584 + ... + 48860.

It is an arithmetic number, because the mean of its divisors is an integer number (2300400).

Almost surely, 2^61579494 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 61579494, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (73612800).

61579494 is an abundant number, since it is smaller than the sum of its proper divisors (85646106).

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

61579494 is a wasteful number, since it uses less digits than its factorization.

61579494 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1354 (or 1348 counting only the distinct ones).

The product of its digits is 272160, while the sum is 45.

The square root of 61579494 is about 7847.2602862400. The cubic root of 61579494 is about 394.8923361968.

It can be divided in two parts, 6157 and 9494, that added together give a palindrome (15651).

The spelling of 61579494 in words is "sixty-one million, five hundred seventy-nine thousand, four hundred ninety-four".