129723916562 has 8 divisors (see below), whose sum is σ = 194587404300. Its totient is φ = 64861448464.

The previous prime is 129723916559. The next prime is 129723916573. The reversal of 129723916562 is 265619327921.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 101321892721 + 28402023841 = 318311^2 + 168529^2 .

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

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, 355364 + ... + 621072.

Almost surely, 2^129723916562 is an apocalyptic number.

129723916562 is a deficient number, since it is larger than the sum of its proper divisors (64863487738).

129723916562 is a wasteful number, since it uses less digits than its factorization.

129723916562 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 509820.

The product of its digits is 2449440, while the sum is 53.

The spelling of 129723916562 in words is "one hundred twenty-nine billion, seven hundred twenty-three million, nine hundred sixteen thousand, five hundred sixty-two".