25511249377 has 2 divisors, whose sum is σ = 25511249378. Its totient is φ = 25511249376.

The previous prime is 25511249371. The next prime is 25511249417. The reversal of 25511249377 is 77394211552.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19541523681 + 5969725696 = 139791^2 + 77264^2 .

It is a cyclic number.

It is not a de Polignac number, because 25511249377 - 2³ = 25511249369 is a prime.

It is not a weakly prime, because it can be changed into another prime (25511249371) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12755624688 + 12755624689.

It is an arithmetic number, because the mean of its divisors is an integer number (12755624689).

Almost surely, 2^25511249377 is an apocalyptic number.

It is an amenable number.

25511249377 is a deficient number, since it is larger than the sum of its proper divisors (1).

25511249377 is an equidigital number, since it uses as much as digits as its factorization.

25511249377 is an evil number, because the sum of its binary digits is even.

The product of its digits is 529200, while the sum is 46.

The spelling of 25511249377 in words is "twenty-five billion, five hundred eleven million, two hundred forty-nine thousand, three hundred seventy-seven".