2563663551 has 8 divisors (see below), whose sum is σ = 3490946304. Its totient is φ = 1672744920.

The previous prime is 2563663499. The next prime is 2563663573. The reversal of 2563663551 is 1553663652.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-2563663551 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2563663591) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9090865 + ... + 9091146.

It is an arithmetic number, because the mean of its divisors is an integer number (436368288).

Almost surely, 2^2563663551 is an apocalyptic number.

2563663551 is a deficient number, since it is larger than the sum of its proper divisors (927282753).

2563663551 is a wasteful number, since it uses less digits than its factorization.

2563663551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18182061.

The product of its digits is 486000, while the sum is 42.

The square root of 2563663551 is about 50632.6332615636. The cubic root of 2563663551 is about 1368.6330071435.

The spelling of 2563663551 in words is "two billion, five hundred sixty-three million, six hundred sixty-three thousand, five hundred fifty-one".