13151438494 has 4 divisors (see below), whose sum is σ = 19727157744. Its totient is φ = 6575719246.

The previous prime is 13151438441. The next prime is 13151438519. The reversal of 13151438494 is 49483415131.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×13151438494² (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 13151438494.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3287859622 + ... + 3287859625.

It is an arithmetic number, because the mean of its divisors is an integer number (4931789436).

Almost surely, 2^13151438494 is an apocalyptic number.

13151438494 is a deficient number, since it is larger than the sum of its proper divisors (6575719250).

13151438494 is an equidigital number, since it uses as much as digits as its factorization.

13151438494 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6575719249.

The product of its digits is 207360, while the sum is 43.

The spelling of 13151438494 in words is "thirteen billion, one hundred fifty-one million, four hundred thirty-eight thousand, four hundred ninety-four".