15545544423 has 16 divisors (see below), whose sum is σ = 20834520960. Its totient is φ = 10310249376.

The previous prime is 15545544419. The next prime is 15545544467. The reversal of 15545544423 is 32444554551.

It is not a de Polignac number, because 15545544423 - 2² = 15545544419 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15545544403) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 533436 + ... + 561822.

It is an arithmetic number, because the mean of its divisors is an integer number (1302157560).

Almost surely, 2^15545544423 is an apocalyptic number.

15545544423 is a deficient number, since it is larger than the sum of its proper divisors (5288976537).

15545544423 is a wasteful number, since it uses less digits than its factorization.

15545544423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29326.

The product of its digits is 960000, while the sum is 42.

The spelling of 15545544423 in words is "fifteen billion, five hundred forty-five million, five hundred forty-four thousand, four hundred twenty-three".