61516610331115 has 4 divisors (see below), whose sum is σ = 73819932397344. Its totient is φ = 49213288264888.

The previous prime is 61516610331089. The next prime is 61516610331133. The reversal of 61516610331115 is 51113301661516.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 61516610331115 - 2¹⁷ = 61516610200043 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6151661033107 + ... + 6151661033116.

It is an arithmetic number, because the mean of its divisors is an integer number (18454983099336).

Almost surely, 2^{61516610331115} is an apocalyptic number.

61516610331115 is a deficient number, since it is larger than the sum of its proper divisors (12303322066229).

61516610331115 is a wasteful number, since it uses less digits than its factorization.

61516610331115 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12303322066228.

The product of its (nonzero) digits is 48600, while the sum is 40.

The spelling of 61516610331115 in words is "sixty-one trillion, five hundred sixteen billion, six hundred ten million, three hundred thirty-one thousand, one hundred fifteen".