2563537791 has 4 divisors (see below), whose sum is σ = 3418050392. Its totient is φ = 1709025192.

The previous prime is 2563537789. The next prime is 2563537793. The reversal of 2563537791 is 1977353652.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (2563537789) and next prime (2563537793).

It is not a de Polignac number, because 2563537791 - 2¹ = 2563537789 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2563537791.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2563537793) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 427256296 + ... + 427256301.

It is an arithmetic number, because the mean of its divisors is an integer number (854512598).

Almost surely, 2^2563537791 is an apocalyptic number.

2563537791 is a deficient number, since it is larger than the sum of its proper divisors (854512601).

2563537791 is an equidigital number, since it uses as much as digits as its factorization.

2563537791 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 854512600.

The product of its digits is 1190700, while the sum is 48.

The square root of 2563537791 is about 50631.3913595113. The cubic root of 2563537791 is about 1368.6106274386.

The spelling of 2563537791 in words is "two billion, five hundred sixty-three million, five hundred thirty-seven thousand, seven hundred ninety-one".