15542068868 has 12 divisors (see below), whose sum is σ = 27202199052. Its totient is φ = 7770012000.

The previous prime is 15542068847. The next prime is 15542068873. The reversal of 15542068868 is 86886024551.

It can be written as a sum of positive squares in 2 ways, for example, as 11253390724 + 4288678144 = 106082^2 + 65488^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 220883 + ... + 282618.

It is an arithmetic number, because the mean of its divisors is an integer number (2266849921).

Almost surely, 2^15542068868 is an apocalyptic number.

It is an amenable number.

15542068868 is a deficient number, since it is larger than the sum of its proper divisors (11660130184).

15542068868 is a wasteful number, since it uses less digits than its factorization.

15542068868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 511222 (or 511220 counting only the distinct ones).

The product of its (nonzero) digits is 3686400, while the sum is 53.

The spelling of 15542068868 in words is "fifteen billion, five hundred forty-two million, sixty-eight thousand, eight hundred sixty-eight".