15955609823 has 4 divisors (see below), whose sum is σ = 15956163960. Its totient is φ = 15955055688.

The previous prime is 15955609807. The next prime is 15955609853. The reversal of 15955609823 is 32890655951.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 15955609823 - 2⁴ = 15955609807 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 (15955609853) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 231365 + ... + 292302.

It is an arithmetic number, because the mean of its divisors is an integer number (3989040990).

Almost surely, 2^15955609823 is an apocalyptic number.

15955609823 is a deficient number, since it is larger than the sum of its proper divisors (554137).

15955609823 is an equidigital number, since it uses as much as digits as its factorization.

15955609823 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 554136.

The product of its (nonzero) digits is 2916000, while the sum is 53.

The spelling of 15955609823 in words is "fifteen billion, nine hundred fifty-five million, six hundred nine thousand, eight hundred twenty-three".