61055915 has 16 divisors (see below), whose sum is σ = 78236928. Its totient is φ = 45630816.

The previous prime is 61055899. The next prime is 61055923. The reversal of 61055915 is 51955016.

It is a cyclic number.

It is not a de Polignac number, because 61055915 - 2⁴ = 61055899 is a prime.

It is a Duffinian 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, 1229 + ... + 11118.

It is an arithmetic number, because the mean of its divisors is an integer number (4889808).

Almost surely, 2^61055915 is an apocalyptic number.

61055915 is a deficient number, since it is larger than the sum of its proper divisors (17181013).

61055915 is a wasteful number, since it uses less digits than its factorization.

61055915 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12418.

The product of its (nonzero) digits is 6750, while the sum is 32.

The square root of 61055915 is about 7813.8284470546. The cubic root of 61055915 is about 393.7699598515.

The spelling of 61055915 in words is "sixty-one million, fifty-five thousand, nine hundred fifteen".