13444336425 has 48 divisors (see below), whose sum is σ = 24389563968. Its totient is φ = 6493843200.

The previous prime is 13444336337. The next prime is 13444336427. The reversal of 13444336425 is 52463344431.

It is not a de Polignac number, because 13444336425 - 2²³ = 13435947817 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (13444336427) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 78411 + ... + 181760.

It is an arithmetic number, because the mean of its divisors is an integer number (508115916).

Almost surely, 2^13444336425 is an apocalyptic number.

13444336425 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

13444336425 is a deficient number, since it is larger than the sum of its proper divisors (10945227543).

13444336425 is a wasteful number, since it uses less digits than its factorization.

13444336425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 260250 (or 260245 counting only the distinct ones).

The product of its digits is 414720, while the sum is 39.

The spelling of 13444336425 in words is "thirteen billion, four hundred forty-four million, three hundred thirty-six thousand, four hundred twenty-five".