15389449812 has 72 divisors (see below), whose sum is σ = 43584576672. Its totient is φ = 4537425600.

The previous prime is 15389449811. The next prime is 15389449861. The reversal of 15389449812 is 21894498351.

It is a happy number.

15389449812 is a `hidden beast` number, since 1 + 53 + 8 + 94 + 498 + 12 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15389449811) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 510514 + ... + 539817.

Almost surely, 2^15389449812 is an apocalyptic number.

15389449812 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

15389449812 is an abundant number, since it is smaller than the sum of its proper divisors (28195126860).

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

15389449812 is a wasteful number, since it uses less digits than its factorization.

15389449812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1050389 (or 1050384 counting only the distinct ones).

The product of its digits is 2488320, while the sum is 54.

The spelling of 15389449812 in words is "fifteen billion, three hundred eighty-nine million, four hundred forty-nine thousand, eight hundred twelve".