129816989494 has 8 divisors (see below), whose sum is σ = 194736792600. Its totient is φ = 64904725296.

The previous prime is 129816989473. The next prime is 129816989503. The reversal of 129816989494 is 494989618921.

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

It is a super-2 number, since 2×129816989494² (a number of 23 digits) contains 22 as substring.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1841479 + ... + 1910674.

It is an arithmetic number, because the mean of its divisors is an integer number (24342099075).

Almost surely, 2^129816989494 is an apocalyptic number.

129816989494 is a deficient number, since it is larger than the sum of its proper divisors (64919803106).

129816989494 is a wasteful number, since it uses less digits than its factorization.

129816989494 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3769454.

The product of its digits is 80621568, while the sum is 70.

The spelling of 129816989494 in words is "one hundred twenty-nine billion, eight hundred sixteen million, nine hundred eighty-nine thousand, four hundred ninety-four".