15899734345 has 16 divisors (see below), whose sum is σ = 20817751680. Its totient is φ = 11561468800.

The previous prime is 15899734303. The next prime is 15899734369. The reversal of 15899734345 is 54343799851.

It is a happy number.

It is not a de Polignac number, because 15899734345 - 2¹⁵ = 15899701577 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 15899734345.

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, 352221 + ... + 394789.

It is an arithmetic number, because the mean of its divisors is an integer number (1301109480).

Almost surely, 2^15899734345 is an apocalyptic number.

It is an amenable number.

15899734345 is a deficient number, since it is larger than the sum of its proper divisors (4918017335).

15899734345 is a wasteful number, since it uses less digits than its factorization.

15899734345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49376.

The product of its digits is 16329600, while the sum is 58.

The spelling of 15899734345 in words is "fifteen billion, eight hundred ninety-nine million, seven hundred thirty-four thousand, three hundred forty-five".