15554545423 has 4 divisors (see below), whose sum is σ = 15559321480. Its totient is φ = 15549769368.

The previous prime is 15554545393. The next prime is 15554545427. The reversal of 15554545423 is 32454545551.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 15554545423 - 2¹³ = 15554537231 is a prime.

It is a Duffinian number.

It is a zygodrome in base 2.

It is a self number, because there is not a number n which added to its sum of digits gives 15554545423.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15554545427) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2383140 + ... + 2389657.

It is an arithmetic number, because the mean of its divisors is an integer number (3889830370).

Almost surely, 2^15554545423 is an apocalyptic number.

15554545423 is a deficient number, since it is larger than the sum of its proper divisors (4776057).

15554545423 is an equidigital number, since it uses as much as digits as its factorization.

15554545423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4776056.

The product of its digits is 1200000, while the sum is 43.

The spelling of 15554545423 in words is "fifteen billion, five hundred fifty-four million, five hundred forty-five thousand, four hundred twenty-three".