15955395387 has 16 divisors (see below), whose sum is σ = 21472635648. Its totient is φ = 10537979040.

The previous prime is 15955395383. The next prime is 15955395403. The reversal of 15955395387 is 78359355951.

It is not a de Polignac number, because 15955395387 - 2² = 15955395383 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 15955395387.

It is not an unprimeable number, because it can be changed into a prime (15955395383) 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, 92562 + ... + 201192.

It is an arithmetic number, because the mean of its divisors is an integer number (1342039728).

Almost surely, 2^15955395387 is an apocalyptic number.

15955395387 is a deficient number, since it is larger than the sum of its proper divisors (5517240261).

15955395387 is a wasteful number, since it uses less digits than its factorization.

15955395387 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109090.

The product of its digits is 25515000, while the sum is 60.

The spelling of 15955395387 in words is "fifteen billion, nine hundred fifty-five million, three hundred ninety-five thousand, three hundred eighty-seven".