25139091277 has 2 divisors, whose sum is σ = 25139091278. Its totient is φ = 25139091276.

The previous prime is 25139091251. The next prime is 25139091323. The reversal of 25139091277 is 77219093152.

It is an a-pointer prime, because the next prime (25139091323) can be obtained adding 25139091277 to its sum of digits (46).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19927839556 + 5211251721 = 141166^2 + 72189^2 .

It is a cyclic number.

It is not a de Polignac number, because 25139091277 - 2³¹ = 22991607629 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25139091227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12569545638 + 12569545639.

It is an arithmetic number, because the mean of its divisors is an integer number (12569545639).

Almost surely, 2^25139091277 is an apocalyptic number.

It is an amenable number.

25139091277 is a deficient number, since it is larger than the sum of its proper divisors (1).

25139091277 is an equidigital number, since it uses as much as digits as its factorization.

25139091277 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 238140, while the sum is 46.

The spelling of 25139091277 in words is "twenty-five billion, one hundred thirty-nine million, ninety-one thousand, two hundred seventy-seven".