16615606615 has 16 divisors (see below), whose sum is σ = 20432539008. Its totient is φ = 12965211136.

The previous prime is 16615606603. The next prime is 16615606621. The reversal of 16615606615 is 51660651661.

It is a cyclic number.

It is not a de Polignac number, because 16615606615 - 2⁷ = 16615606487 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 15 ways as a sum of consecutive naturals, for example, 51802 + ... + 189511.

It is an arithmetic number, because the mean of its divisors is an integer number (1277033688).

Almost surely, 2^16615606615 is an apocalyptic number.

16615606615 is a deficient number, since it is larger than the sum of its proper divisors (3816932393).

16615606615 is a wasteful number, since it uses less digits than its factorization.

16615606615 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 241658.

The product of its (nonzero) digits is 194400, while the sum is 43.

The spelling of 16615606615 in words is "sixteen billion, six hundred fifteen million, six hundred six thousand, six hundred fifteen".