2563801955 has 64 divisors (see below), whose sum is σ = 3898298880. Its totient is φ = 1590451200.

The previous prime is 2563801901. The next prime is 2563801963. The reversal of 2563801955 is 5591083652.

It is a Cunningham number, because it is equal to 50634²-1.

It is not a de Polignac number, because 2563801955 - 2¹⁶ = 2563736419 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 554684 + ... + 559286.

It is an arithmetic number, because the mean of its divisors is an integer number (60910920).

Almost surely, 2^2563801955 is an apocalyptic number.

2563801955 is a deficient number, since it is larger than the sum of its proper divisors (1334496925).

2563801955 is a wasteful number, since it uses less digits than its factorization.

2563801955 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4692.

The product of its (nonzero) digits is 324000, while the sum is 44.

The square root of 2563801955 is about 50633.9999901252. Note that the first 5 decimals coincide. The cubic root of 2563801955 is about 1368.6576360740.

The spelling of 2563801955 in words is "two billion, five hundred sixty-three million, eight hundred one thousand, nine hundred fifty-five".