61616015 has 16 divisors (see below), whose sum is σ = 75387648. Its totient is φ = 48335616.

The previous prime is 61615999. The next prime is 61616017. The reversal of 61616015 is 51061616.

It is a cyclic number.

It is not a de Polignac number, because 61616015 - 2⁴ = 61615999 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61616017) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 81017 + ... + 81773.

It is an arithmetic number, because the mean of its divisors is an integer number (4711728).

Almost surely, 2^61616015 is an apocalyptic number.

61616015 is a deficient number, since it is larger than the sum of its proper divisors (13771633).

61616015 is a wasteful number, since it uses less digits than its factorization.

61616015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1058.

The product of its (nonzero) digits is 1080, while the sum is 26.

The square root of 61616015 is about 7849.5869318073. The cubic root of 61616015 is about 394.9703871407.

The spelling of 61616015 in words is "sixty-one million, six hundred sixteen thousand, fifteen".