13158021391 has 8 divisors (see below), whose sum is σ = 13522025664. Its totient is φ = 12796068480.

The previous prime is 13158021389. The next prime is 13158021479. The reversal of 13158021391 is 19312085131.

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 13158021391 - 2¹ = 13158021389 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13158021991) 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, 499831 + ... + 525496.

It is an arithmetic number, because the mean of its divisors is an integer number (1690253208).

Almost surely, 2^13158021391 is an apocalyptic number.

13158021391 is a deficient number, since it is larger than the sum of its proper divisors (364004273).

13158021391 is a wasteful number, since it uses less digits than its factorization.

13158021391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1025681.

The product of its (nonzero) digits is 6480, while the sum is 34.

The spelling of 13158021391 in words is "thirteen billion, one hundred fifty-eight million, twenty-one thousand, three hundred ninety-one".