13156406641 has 16 divisors (see below), whose sum is σ = 15932989440. Its totient is φ = 10605150720.

The previous prime is 13156406639. The next prime is 13156406657. The reversal of 13156406641 is 14660465131.

It is a cyclic number.

It is not a de Polignac number, because 13156406641 - 2¹ = 13156406639 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 13156406641.

It is not an unprimeable number, because it can be changed into a prime (13156416641) 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, 108981 + ... + 195421.

It is an arithmetic number, because the mean of its divisors is an integer number (995811840).

Almost surely, 2^13156406641 is an apocalyptic number.

It is an amenable number.

13156406641 is a deficient number, since it is larger than the sum of its proper divisors (2776582799).

13156406641 is a wasteful number, since it uses less digits than its factorization.

13156406641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87744.

The product of its (nonzero) digits is 51840, while the sum is 37.

The spelling of 13156406641 in words is "thirteen billion, one hundred fifty-six million, four hundred six thousand, six hundred forty-one".