15544742899 has 12 divisors (see below), whose sum is σ = 18098274744. Its totient is φ = 13312559904.

The previous prime is 15544742887. The next prime is 15544742903. The reversal of 15544742899 is 99824744551.

It is not a de Polignac number, because 15544742899 - 2¹¹ = 15544740851 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (15544742839) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 79402 + ... + 193375.

It is an arithmetic number, because the mean of its divisors is an integer number (1508189562).

Almost surely, 2^15544742899 is an apocalyptic number.

15544742899 is a deficient number, since it is larger than the sum of its proper divisors (2553531845).

15544742899 is a wasteful number, since it uses less digits than its factorization.

15544742899 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 273954 (or 273947 counting only the distinct ones).

The product of its digits is 14515200, while the sum is 58.

The spelling of 15544742899 in words is "fifteen billion, five hundred forty-four million, seven hundred forty-two thousand, eight hundred ninety-nine".