15118045553 has 4 divisors (see below), whose sum is σ = 16280972148. Its totient is φ = 13955118960.

The previous prime is 15118045531. The next prime is 15118045577. The reversal of 15118045553 is 35554081151.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 3664123024 + 11453922529 = 60532^2 + 107023^2 .

It is a cyclic number.

It is not a de Polignac number, because 15118045553 - 2¹² = 15118041457 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (15118045513) 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, 581463278 + ... + 581463303.

It is an arithmetic number, because the mean of its divisors is an integer number (4070243037).

Almost surely, 2^15118045553 is an apocalyptic number.

15118045553 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

15118045553 is a deficient number, since it is larger than the sum of its proper divisors (1162926595).

15118045553 is a wasteful number, since it uses less digits than its factorization.

15118045553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1162926594.

The product of its (nonzero) digits is 60000, while the sum is 38.

The spelling of 15118045553 in words is "fifteen billion, one hundred eighteen million, forty-five thousand, five hundred fifty-three".