61615136 has 36 divisors (see below), whose sum is σ = 133343406. Its totient is φ = 28005120.

The previous prime is 61615129. The next prime is 61615159. The reversal of 61615136 is 63151616.

It can be written as a sum of positive squares in only one way, i.e., 44142736 + 17472400 = 6644^2 + 4180^2 .

It is a junction number, because it is equal to n+sod(n) for n = 61615099 and 61615108.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4085 + ... + 11828.

Almost surely, 2^61615136 is an apocalyptic number.

It is an amenable number.

61615136 is an abundant number, since it is smaller than the sum of its proper divisors (71728270).

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

61615136 is a wasteful number, since it uses less digits than its factorization.

61615136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15945 (or 15926 counting only the distinct ones).

The product of its digits is 3240, while the sum is 29.

The square root of 61615136 is about 7849.5309414003. The cubic root of 61615136 is about 394.9685089460.

The spelling of 61615136 in words is "sixty-one million, six hundred fifteen thousand, one hundred thirty-six".