5011611661665 has 24 divisors (see below), whose sum is σ = 9927764054208. Its totient is φ = 2291022473760.

The previous prime is 5011611661613. The next prime is 5011611661697. The reversal of 5011611661665 is 5661661161105.

5011611661665 is a `hidden beast` number, since 5 + 0 + 1 + 16 + 1 + 16 + 616 + 6 + 5 = 666.

It is not a de Polignac number, because 5011611661665 - 2¹³ = 5011611653473 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 5011611661665.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7954938831 + ... + 7954939460.

It is an arithmetic number, because the mean of its divisors is an integer number (413656835592).

Almost surely, 2^{5011611661665} is an apocalyptic number.

It is an amenable number.

5011611661665 is a deficient number, since it is larger than the sum of its proper divisors (4916152392543).

5011611661665 is a wasteful number, since it uses less digits than its factorization.

5011611661665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15909878309 (or 15909878306 counting only the distinct ones).

The product of its (nonzero) digits is 194400, while the sum is 45.

The spelling of 5011611661665 in words is "five trillion, eleven billion, six hundred eleven million, six hundred sixty-one thousand, six hundred sixty-five".