13221596958 has 16 divisors (see below), whose sum is σ = 26450810496. Its totient is φ = 4405929560.

The previous prime is 13221596953. The next prime is 13221596977. The reversal of 13221596958 is 85969512231.

It is a happy number.

It is a super-2 number, since 2×13221596958² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 13221596958.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13221596953) 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, 294666 + ... + 336557.

It is an arithmetic number, because the mean of its divisors is an integer number (1653175656).

Almost surely, 2^13221596958 is an apocalyptic number.

13221596958 is an abundant number, since it is smaller than the sum of its proper divisors (13229213538).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

13221596958 is a wasteful number, since it uses less digits than its factorization.

13221596958 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 634719.

The product of its digits is 1166400, while the sum is 51.

The spelling of 13221596958 in words is "thirteen billion, two hundred twenty-one million, five hundred ninety-six thousand, nine hundred fifty-eight".