15243668885 has 24 divisors (see below), whose sum is σ = 19435557960. Its totient is φ = 11437934592.

The previous prime is 15243668833. The next prime is 15243668917. The reversal of 15243668885 is 58886634251.

It can be written as a sum of positive squares in 12 ways, for example, as 165302449 + 15078366436 = 12857^2 + 122794^2 .

It is not a de Polignac number, because 15243668885 - 2¹² = 15243664789 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 15243668885.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 11825321 + ... + 11826609.

It is an arithmetic number, because the mean of its divisors is an integer number (809814915).

Almost surely, 2^15243668885 is an apocalyptic number.

It is an amenable number.

15243668885 is a deficient number, since it is larger than the sum of its proper divisors (4191889075).

15243668885 is an equidigital number, since it uses as much as digits as its factorization.

15243668885 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2057 (or 1684 counting only the distinct ones).

The product of its digits is 11059200, while the sum is 56.

The spelling of 15243668885 in words is "fifteen billion, two hundred forty-three million, six hundred sixty-eight thousand, eight hundred eighty-five".