25687145243 has 2 divisors, whose sum is σ = 25687145244. Its totient is φ = 25687145242.

The previous prime is 25687145123. The next prime is 25687145249. The reversal of 25687145243 is 34254178652.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 25687145243 - 2²⁴ = 25670368027 is a prime.

It is not a weakly prime, because it can be changed into another prime (25687145249) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12843572621 + 12843572622.

It is an arithmetic number, because the mean of its divisors is an integer number (12843572622).

Almost surely, 2^25687145243 is an apocalyptic number.

25687145243 is a deficient number, since it is larger than the sum of its proper divisors (1).

25687145243 is an equidigital number, since it uses as much as digits as its factorization.

25687145243 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1612800, while the sum is 47.

The spelling of 25687145243 in words is "twenty-five billion, six hundred eighty-seven million, one hundred forty-five thousand, two hundred forty-three".