15149806438 has 16 divisors (see below), whose sum is σ = 24838032240. Its totient is φ = 6887856096.

The previous prime is 15149806409. The next prime is 15149806471. The reversal of 15149806438 is 83460894151.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 15149806391 and 15149806400.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4346653 + ... + 4350136.

It is an arithmetic number, because the mean of its divisors is an integer number (1552377015).

Almost surely, 2^15149806438 is an apocalyptic number.

15149806438 is a deficient number, since it is larger than the sum of its proper divisors (9688225802).

15149806438 is a wasteful number, since it uses less digits than its factorization.

15149806438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8696871.

The product of its (nonzero) digits is 829440, while the sum is 49.

The spelling of 15149806438 in words is "fifteen billion, one hundred forty-nine million, eight hundred six thousand, four hundred thirty-eight".