16561235154 has 32 divisors (see below), whose sum is σ = 33417897984. Its totient is φ = 5471341200.

The previous prime is 16561235149. The next prime is 16561235167. The reversal of 16561235154 is 45153216561.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax 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, 380727 + ... + 421989.

It is an arithmetic number, because the mean of its divisors is an integer number (1044309312).

Almost surely, 2^16561235154 is an apocalyptic number.

16561235154 is an abundant number, since it is smaller than the sum of its proper divisors (16856662830).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

16561235154 is a wasteful number, since it uses less digits than its factorization.

16561235154 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41862.

The product of its digits is 108000, while the sum is 39.

The spelling of 16561235154 in words is "sixteen billion, five hundred sixty-one million, two hundred thirty-five thousand, one hundred fifty-four".