16601536401 has 8 divisors (see below), whose sum is σ = 22733635584. Its totient is φ = 10768564080.

The previous prime is 16601536381. The next prime is 16601536409. The reversal of 16601536401 is 10463510661.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 16601536401 - 2¹¹ = 16601534353 is a prime.

It is a super-2 number, since 2×16601536401² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (16601536409) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 74781585 + ... + 74781806.

It is an arithmetic number, because the mean of its divisors is an integer number (2841704448).

Almost surely, 2^16601536401 is an apocalyptic number.

It is an amenable number.

16601536401 is a deficient number, since it is larger than the sum of its proper divisors (6132099183).

16601536401 is a wasteful number, since it uses less digits than its factorization.

16601536401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 149563431.

The product of its (nonzero) digits is 12960, while the sum is 33.

The spelling of 16601536401 in words is "sixteen billion, six hundred one million, five hundred thirty-six thousand, four hundred one".