61105015115 has 16 divisors (see below), whose sum is σ = 75317560128. Its totient is φ = 47556660096.

The previous prime is 61105015091. The next prime is 61105015129. The reversal of 61105015115 is 51151050116.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61105015115 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, 1852709 + ... + 1885401.

It is an arithmetic number, because the mean of its divisors is an integer number (4707347508).

Almost surely, 2^61105015115 is an apocalyptic number.

61105015115 is a deficient number, since it is larger than the sum of its proper divisors (14212545013).

61105015115 is a wasteful number, since it uses less digits than its factorization.

61105015115 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42838.

The product of its (nonzero) digits is 750, while the sum is 26.

The spelling of 61105015115 in words is "sixty-one billion, one hundred five million, fifteen thousand, one hundred fifteen".