2518920553921 has 16 divisors (see below), whose sum is σ = 2626418612160. Its totient is φ = 2413827313920.

The previous prime is 2518920553861. The next prime is 2518920553927. The reversal of 2518920553921 is 1293550298152.

It is a cyclic number.

It is not a de Polignac number, because 2518920553921 - 2²⁹ = 2518383683009 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2518920553927) 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, 368076 + ... + 2274493.

It is an arithmetic number, because the mean of its divisors is an integer number (164151163260).

Almost surely, 2^{2518920553921} is an apocalyptic number.

It is an amenable number.

2518920553921 is a deficient number, since it is larger than the sum of its proper divisors (107498058239).

2518920553921 is a wasteful number, since it uses less digits than its factorization.

2518920553921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2643024.

The product of its (nonzero) digits is 1944000, while the sum is 52.

The spelling of 2518920553921 in words is "two trillion, five hundred eighteen billion, nine hundred twenty million, five hundred fifty-three thousand, nine hundred twenty-one".