61630015 has 32 divisors (see below), whose sum is σ = 85155840. Its totient is φ = 42508800.

The previous prime is 61630003. The next prime is 61630021. The reversal of 61630015 is 51003616.

It is not a de Polignac number, because 61630015 - 2¹¹ = 61627967 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 49450 + ... + 50680.

It is an arithmetic number, because the mean of its divisors is an integer number (2661120).

Almost surely, 2^61630015 is an apocalyptic number.

61630015 is a deficient number, since it is larger than the sum of its proper divisors (23525825).

61630015 is a wasteful number, since it uses less digits than its factorization.

61630015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1303.

The product of its (nonzero) digits is 540, while the sum is 22.

The square root of 61630015 is about 7850.4786478278. The cubic root of 61630015 is about 395.0002990971. Note that the first 3 decimals are identical.

The spelling of 61630015 in words is "sixty-one million, six hundred thirty thousand, fifteen".