15439791422500 has 135 divisors (see below), whose sum is σ = 34186082046501. Its totient is φ = 6099608592000.

The previous prime is 15439791422453. The next prime is 15439791422581. The reversal of 15439791422500 is 522419793451.

The square root of 15439791422500 is 3929350.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 7 ways, for example, as 14998874174244 + 440917248256 = 3872838^2 + 664016^2 .

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 44 ways as a sum of consecutive naturals, for example, 17485607059 + ... + 17485607941.

Almost surely, 2^{15439791422500} is an apocalyptic number.

15439791422500 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

15439791422500 is the 3929350-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 15439791422500

15439791422500 is an abundant number, since it is smaller than the sum of its proper divisors (18746290624001).

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

15439791422500 is an frugal number, since it uses more digits than its factorization.

15439791422500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1968 (or 979 counting only the distinct ones).

The product of its (nonzero) digits is 2721600, while the sum is 52.

The spelling of 15439791422500 in words is "fifteen trillion, four hundred thirty-nine billion, seven hundred ninety-one million, four hundred twenty-two thousand, five hundred".