16261664601 has 16 divisors (see below), whose sum is σ = 26685809024. Its totient is φ = 8577581184.

The previous prime is 16261664599. The next prime is 16261664623. The reversal of 16261664601 is 10646616261.

It is a happy number.

It is not a de Polignac number, because 16261664601 - 2¹ = 16261664599 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a self number, because there is not a number n which added to its sum of digits gives 16261664601.

It is not an unprimeable number, because it can be changed into a prime (16261664641) 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, 29782996 + ... + 29783541.

It is an arithmetic number, because the mean of its divisors is an integer number (1667863064).

Almost surely, 2^16261664601 is an apocalyptic number.

It is an amenable number.

16261664601 is a deficient number, since it is larger than the sum of its proper divisors (10424144423).

16261664601 is a wasteful number, since it uses less digits than its factorization.

16261664601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59566560.

The product of its (nonzero) digits is 62208, while the sum is 39.

The spelling of 16261664601 in words is "sixteen billion, two hundred sixty-one million, six hundred sixty-four thousand, six hundred one".