16611115660655 has 32 divisors (see below), whose sum is σ = 20485428163200. Its totient is φ = 12922987898880.

The previous prime is 16611115660651. The next prime is 16611115660661. The reversal of 16611115660655 is 55606651111661.

It is not a de Polignac number, because 16611115660655 - 2² = 16611115660651 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16611115660651) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 85461521 + ... + 85655669.

It is an arithmetic number, because the mean of its divisors is an integer number (640169630100).

Almost surely, 2^{16611115660655} is an apocalyptic number.

16611115660655 is a deficient number, since it is larger than the sum of its proper divisors (3874312502545).

16611115660655 is a wasteful number, since it uses less digits than its factorization.

16611115660655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 195539.

The product of its (nonzero) digits is 972000, while the sum is 50.

The spelling of 16611115660655 in words is "sixteen trillion, six hundred eleven billion, one hundred fifteen million, six hundred sixty thousand, six hundred fifty-five".