61814536 has 64 divisors (see below), whose sum is σ = 137635200. Its totient is φ = 25479168.

The previous prime is 61814497. The next prime is 61814563. The reversal of 61814536 is 63541816.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 174936 + ... + 175288.

It is an arithmetic number, because the mean of its divisors is an integer number (2150550).

Almost surely, 2^61814536 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 61814536, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (68817600).

61814536 is an abundant number, since it is smaller than the sum of its proper divisors (75820664).

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

61814536 is a wasteful number, since it uses less digits than its factorization.

61814536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 478 (or 474 counting only the distinct ones).

The product of its digits is 17280, while the sum is 34.

The square root of 61814536 is about 7862.2220777589. Note that the first 3 decimals coincide. The cubic root of 61814536 is about 395.3941181942.

The spelling of 61814536 in words is "sixty-one million, eight hundred fourteen thousand, five hundred thirty-six".