15744427868 has 24 divisors (see below), whose sum is σ = 29724949968. Its totient is φ = 7253738496.

The previous prime is 15744427861. The next prime is 15744427921. The reversal of 15744427868 is 86872444751.

It is a Smith number, since the sum of its digits (56) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15744427861) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 239621 + ... + 298172.

It is an arithmetic number, because the mean of its divisors is an integer number (1238539582).

Almost surely, 2^15744427868 is an apocalyptic number.

It is an amenable number.

15744427868 is a deficient number, since it is larger than the sum of its proper divisors (13980522100).

15744427868 is a wasteful number, since it uses less digits than its factorization.

15744427868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 538373 (or 538371 counting only the distinct ones).

The product of its digits is 12042240, while the sum is 56.

The spelling of 15744427868 in words is "fifteen billion, seven hundred forty-four million, four hundred twenty-seven thousand, eight hundred sixty-eight".