25140055639 has 2 divisors, whose sum is σ = 25140055640. Its totient is φ = 25140055638.

The previous prime is 25140055609. The next prime is 25140055663. The reversal of 25140055639 is 93655004152.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 25140055639 - 2¹¹ = 25140053591 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25140055609) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12570027819 + 12570027820.

It is an arithmetic number, because the mean of its divisors is an integer number (12570027820).

Almost surely, 2^25140055639 is an apocalyptic number.

25140055639 is a deficient number, since it is larger than the sum of its proper divisors (1).

25140055639 is an equidigital number, since it uses as much as digits as its factorization.

25140055639 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 162000, while the sum is 40.

The spelling of 25140055639 in words is "twenty-five billion, one hundred forty million, fifty-five thousand, six hundred thirty-nine".