15274989239920 has 80 divisors (see below), whose sum is σ = 36019908239040. Its totient is φ = 6023043532800.

The previous prime is 15274989239911. The next prime is 15274989239933. The reversal of 15274989239920 is 2993298947251.

It is a tau number, because it is divible by the number of its divisors (80).

It is a self number, because there is not a number n which added to its sum of digits gives 15274989239920.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 38660326 + ... + 39053434.

It is an arithmetic number, because the mean of its divisors is an integer number (450248852988).

Almost surely, 2^{15274989239920} is an apocalyptic number.

15274989239920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 15274989239920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18009954119520).

15274989239920 is an abundant number, since it is smaller than the sum of its proper divisors (20744918999120).

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

15274989239920 is a wasteful number, since it uses less digits than its factorization.

15274989239920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 400034 (or 400028 counting only the distinct ones).

The product of its (nonzero) digits is 176359680, while the sum is 70.

The spelling of 15274989239920 in words is "fifteen trillion, two hundred seventy-four billion, nine hundred eighty-nine million, two hundred thirty-nine thousand, nine hundred twenty".