61550516615615 has 16 divisors (see below), whose sum is σ = 76413959193600. Its totient is φ = 47538472515072.

The previous prime is 61550516615591. The next prime is 61550516615677. The reversal of 61550516615615 is 51651661505516.

It is a cyclic number.

It is not a de Polignac number, because 61550516615615 - 2⁶ = 61550516615551 is a prime.

It is a congruent 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, 16105130 + ... + 19556999.

It is an arithmetic number, because the mean of its divisors is an integer number (4775872449600).

Almost surely, 2^{61550516615615} is an apocalyptic number.

61550516615615 is a deficient number, since it is larger than the sum of its proper divisors (14863442577985).

61550516615615 is a wasteful number, since it uses less digits than its factorization.

61550516615615 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35674066.

The product of its (nonzero) digits is 4050000, while the sum is 53.

The spelling of 61550516615615 in words is "sixty-one trillion, five hundred fifty billion, five hundred sixteen million, six hundred fifteen thousand, six hundred fifteen".