13243621725 has 36 divisors (see below), whose sum is σ = 23742980352. Its totient is φ = 7056660000.

The previous prime is 13243621709. The next prime is 13243621829. The reversal of 13243621725 is 52712634231.

13243621725 is a `hidden beast` number, since 1 + 3 + 2 + 4 + 3 + 621 + 7 + 25 = 666.

It is not a de Polignac number, because 13243621725 - 2⁴ = 13243621709 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 13243621725.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 218500 + ... + 272450.

It is an arithmetic number, because the mean of its divisors is an integer number (659527232).

Almost surely, 2^13243621725 is an apocalyptic number.

13243621725 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

13243621725 is a deficient number, since it is larger than the sum of its proper divisors (10499358627).

13243621725 is a wasteful number, since it uses less digits than its factorization.

13243621725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55058 (or 55050 counting only the distinct ones).

The product of its digits is 60480, while the sum is 36.

The spelling of 13243621725 in words is "thirteen billion, two hundred forty-three million, six hundred twenty-one thousand, seven hundred twenty-five".