13155404491 has 8 divisors (see below), whose sum is σ = 13999962240. Its totient is φ = 12318703488.

The previous prime is 13155404447. The next prime is 13155404503. The reversal of 13155404491 is 19440455131.

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

It is a cyclic number.

It is not a de Polignac number, because 13155404491 - 2¹⁹ = 13154880203 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 13155404491.

It is not an unprimeable number, because it can be changed into a prime (13155404441) 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, 1960731 + ... + 1967428.

It is an arithmetic number, because the mean of its divisors is an integer number (1749995280).

Almost surely, 2^13155404491 is an apocalyptic number.

13155404491 is a deficient number, since it is larger than the sum of its proper divisors (844557749).

13155404491 is a wasteful number, since it uses less digits than its factorization.

13155404491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3928373.

The product of its (nonzero) digits is 43200, while the sum is 37.

The spelling of 13155404491 in words is "thirteen billion, one hundred fifty-five million, four hundred four thousand, four hundred ninety-one".