25134988643 has 2 divisors, whose sum is σ = 25134988644. Its totient is φ = 25134988642.

The previous prime is 25134988601. The next prime is 25134988661. The reversal of 25134988643 is 34688943152.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 25134988643 - 2¹⁴ = 25134972259 is a prime.

It is not a weakly prime, because it can be changed into another prime (25134988243) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12567494321 + 12567494322.

It is an arithmetic number, because the mean of its divisors is an integer number (12567494322).

Almost surely, 2^25134988643 is an apocalyptic number.

25134988643 is a deficient number, since it is larger than the sum of its proper divisors (1).

25134988643 is an equidigital number, since it uses as much as digits as its factorization.

25134988643 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4976640, while the sum is 53.

The spelling of 25134988643 in words is "twenty-five billion, one hundred thirty-four million, nine hundred eighty-eight thousand, six hundred forty-three".