15399550591959 has 16 divisors (see below), whose sum is σ = 20544760926464. Its totient is φ = 10260354110400.

The previous prime is 15399550591951. The next prime is 15399550592021. The reversal of 15399550591959 is 95919505599351.

It is not a de Polignac number, because 15399550591959 - 2³ = 15399550591951 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15399550591951) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 213932844 + ... + 214004814.

It is an arithmetic number, because the mean of its divisors is an integer number (1284047557904).

Almost surely, 2^{15399550591959} is an apocalyptic number.

15399550591959 is a deficient number, since it is larger than the sum of its proper divisors (5145210334505).

15399550591959 is a wasteful number, since it uses less digits than its factorization.

15399550591959 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 112758.

The product of its (nonzero) digits is 553584375, while the sum is 75.

The spelling of 15399550591959 in words is "fifteen trillion, three hundred ninety-nine billion, five hundred fifty million, five hundred ninety-one thousand, nine hundred fifty-nine".