15556055523 has 16 divisors (see below), whose sum is σ = 21031658400. Its totient is φ = 10225661184.

The previous prime is 15556055477. The next prime is 15556055551. The reversal of 15556055523 is 32555065551.

It is not a de Polignac number, because 15556055523 - 2¹⁴ = 15556039139 is a prime.

It is not an unprimeable number, because it can be changed into a prime (15556055423) 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, 944265 + ... + 960597.

It is an arithmetic number, because the mean of its divisors is an integer number (1314478650).

Almost surely, 2^15556055523 is an apocalyptic number.

15556055523 is a deficient number, since it is larger than the sum of its proper divisors (5475602877).

15556055523 is a wasteful number, since it uses less digits than its factorization.

15556055523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20758.

The product of its (nonzero) digits is 562500, while the sum is 42.

The spelling of 15556055523 in words is "fifteen billion, five hundred fifty-six million, fifty-five thousand, five hundred twenty-three".