15399671616 has 112 divisors (see below), whose sum is σ = 51739678080. Its totient is φ = 4399902720.

The previous prime is 15399671603. The next prime is 15399671621. The reversal of 15399671616 is 61617699351.

It is a happy number.

15399671616 is a `hidden beast` number, since 1 + 539 + 96 + 7 + 1 + 6 + 16 = 666.

It is a tau number, because it is divible by the number of its divisors (112).

It is a Harshad number since it is a multiple of its sum of digits (54).

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, 624465 + ... + 648656.

Almost surely, 2^15399671616 is an apocalyptic number.

15399671616 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

15399671616 is an abundant number, since it is smaller than the sum of its proper divisors (36340006464).

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

15399671616 is a wasteful number, since it uses less digits than its factorization.

15399671616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1273149 (or 1273133 counting only the distinct ones).

The product of its digits is 1837080, while the sum is 54.

The spelling of 15399671616 in words is "fifteen billion, three hundred ninety-nine million, six hundred seventy-one thousand, six hundred sixteen".