61116005001565 has 4 divisors (see below), whose sum is σ = 73339206001884. Its totient is φ = 48892804001248.

The previous prime is 61116005001539. The next prime is 61116005001607. The reversal of 61116005001565 is 56510050061116.

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

It can be written as a sum of positive squares in 2 ways, for example, as 23416724280889 + 37699280720676 = 4839083^2 + 6139974^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61116005001565 is a prime.

It is a Duffinian number.

It is a congruent 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, 6111600500152 + ... + 6111600500161.

It is an arithmetic number, because the mean of its divisors is an integer number (18334801500471).

Almost surely, 2^{61116005001565} is an apocalyptic number.

It is an amenable number.

61116005001565 is a deficient number, since it is larger than the sum of its proper divisors (12223201000319).

61116005001565 is a wasteful number, since it uses less digits than its factorization.

61116005001565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12223201000318.

The product of its (nonzero) digits is 27000, while the sum is 37.

The spelling of 61116005001565 in words is "sixty-one trillion, one hundred sixteen billion, five million, one thousand, five hundred sixty-five".