16591262401 has 16 divisors (see below), whose sum is σ = 19374372864. Its totient is φ = 13911681744.

The previous prime is 16591262399. The next prime is 16591262407. The reversal of 16591262401 is 10426219561.

It is a cyclic number.

It is not a de Polignac number, because 16591262401 - 2¹ = 16591262399 is a prime.

It is not an unprimeable number, because it can be changed into a prime (16591262407) 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, 726706 + ... + 749188.

It is an arithmetic number, because the mean of its divisors is an integer number (1210898304).

Almost surely, 2^16591262401 is an apocalyptic number.

It is an amenable number.

16591262401 is a deficient number, since it is larger than the sum of its proper divisors (2783110463).

16591262401 is a wasteful number, since it uses less digits than its factorization.

16591262401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24780.

The product of its (nonzero) digits is 25920, while the sum is 37.

The spelling of 16591262401 in words is "sixteen billion, five hundred ninety-one million, two hundred sixty-two thousand, four hundred one".