15355422889 has 9 divisors (see below), whose sum is σ = 15906901413. Its totient is φ = 14822455872.

The previous prime is 15355422857. The next prime is 15355422893. The reversal of 15355422889 is 98822455351.

The square root of 15355422889 is 123917.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 688275225 + 14667147664 = 26235^2 + 121108^2 .

It is not a de Polignac number, because 15355422889 - 2⁵ = 15355422857 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (15355422899) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 3591457 + ... + 3595729.

Almost surely, 2^15355422889 is an apocalyptic number.

15355422889 is the 123917-th square number.

15355422889 is the 61959-th centered octagonal number.

It is an amenable number.

15355422889 is a deficient number, since it is larger than the sum of its proper divisors (551478524).

15355422889 is an frugal number, since it uses more digits than its factorization.

15355422889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8604 (or 4302 counting only the distinct ones).

The product of its digits is 3456000, while the sum is 52.

It can be divided in two parts, 15355 and 422889, that added together give a square (438244 = 662²).

The spelling of 15355422889 in words is "fifteen billion, three hundred fifty-five million, four hundred twenty-two thousand, eight hundred eighty-nine".