15868968552 has 80 divisors (see below), whose sum is σ = 44554148100. Its totient is φ = 5277000960.

The previous prime is 15868968551. The next prime is 15868968569. The reversal of 15868968552 is 25586986851.

15868968552 is a `hidden beast` number, since 15 + 8 + 6 + 8 + 9 + 68 + 552 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 12708954756 + 3160013796 = 112734^2 + 56214^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 15868968552.

It is not an unprimeable number, because it can be changed into a prime (15868968551) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 243724 + ... + 301892.

Almost surely, 2^15868968552 is an apocalyptic number.

15868968552 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 15868968552, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22277074050).

15868968552 is an abundant number, since it is smaller than the sum of its proper divisors (28685179548).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

15868968552 is a wasteful number, since it uses less digits than its factorization.

15868968552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58608 (or 58595 counting only the distinct ones).

The product of its digits is 41472000, while the sum is 63.

The spelling of 15868968552 in words is "fifteen billion, eight hundred sixty-eight million, nine hundred sixty-eight thousand, five hundred fifty-two".