25654579187 has 2 divisors, whose sum is σ = 25654579188. Its totient is φ = 25654579186.

The previous prime is 25654579183. The next prime is 25654579219. The reversal of 25654579187 is 78197545652.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 25654579187 - 2² = 25654579183 is a prime.

It is not a weakly prime, because it can be changed into another prime (25654579183) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12827289593 + 12827289594.

It is an arithmetic number, because the mean of its divisors is an integer number (12827289594).

Almost surely, 2^25654579187 is an apocalyptic number.

25654579187 is a deficient number, since it is larger than the sum of its proper divisors (1).

25654579187 is an equidigital number, since it uses as much as digits as its factorization.

25654579187 is an evil number, because the sum of its binary digits is even.

The product of its digits is 21168000, while the sum is 59.

The spelling of 25654579187 in words is "twenty-five billion, six hundred fifty-four million, five hundred seventy-nine thousand, one hundred eighty-seven".