18623513463555 has 64 divisors (see below), whose sum is σ = 40007995388928. Its totient is φ = 7144284879360.

The previous prime is 18623513463521. The next prime is 18623513463619. The reversal of 18623513463555 is 55536431532681.

It is not a de Polignac number, because 18623513463555 - 2¹⁰ = 18623513462531 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 18623513463495 and 18623513463504.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 620148604 + ... + 620178633.

It is an arithmetic number, because the mean of its divisors is an integer number (625124927952).

Almost surely, 2^{18623513463555} is an apocalyptic number.

18623513463555 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

18623513463555 is an abundant number, since it is smaller than the sum of its proper divisors (21384481925373).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18623513463555 is a wasteful number, since it uses less digits than its factorization.

18623513463555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1240327276.

The product of its digits is 38880000, while the sum is 57.

The spelling of 18623513463555 in words is "eighteen trillion, six hundred twenty-three billion, five hundred thirteen million, four hundred sixty-three thousand, five hundred fifty-five".