16615253553 has 16 divisors (see below), whose sum is σ = 22865429760. Its totient is φ = 10726561296.

The previous prime is 16615253539. The next prime is 16615253579. The reversal of 16615253553 is 35535251661.

It is not a de Polignac number, because 16615253553 - 2⁴ = 16615253537 is a prime.

It is not an unprimeable number, because it can be changed into a prime (16615253453) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 688675 + ... + 712392.

It is an arithmetic number, because the mean of its divisors is an integer number (1429089360).

Almost surely, 2^16615253553 is an apocalyptic number.

It is an amenable number.

16615253553 is a deficient number, since it is larger than the sum of its proper divisors (6250176207).

16615253553 is a wasteful number, since it uses less digits than its factorization.

16615253553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1401196.

The product of its digits is 405000, while the sum is 42.

The spelling of 16615253553 in words is "sixteen billion, six hundred fifteen million, two hundred fifty-three thousand, five hundred fifty-three".