2563997834 has 16 divisors (see below), whose sum is σ = 4128019848. Its totient is φ = 1190057472.

The previous prime is 2563997833. The next prime is 2563997837. The reversal of 2563997834 is 4387993652.

It can be written as a sum of positive squares in 4 ways, for example, as 2415231025 + 148766809 = 49145^2 + 12197^2 .

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 2563997834.

It is not an unprimeable number, because it can be changed into a prime (2563997831) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 514037 + ... + 519000.

Almost surely, 2^2563997834 is an apocalyptic number.

2563997834 is a deficient number, since it is larger than the sum of its proper divisors (1564022014).

2563997834 is a wasteful number, since it uses less digits than its factorization.

2563997834 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1033129.

The product of its digits is 9797760, while the sum is 56.

The square root of 2563997834 is about 50635.9342167200. The cubic root of 2563997834 is about 1368.6924911403.

The spelling of 2563997834 in words is "two billion, five hundred sixty-three million, nine hundred ninety-seven thousand, eight hundred thirty-four".