25520653091 has 2 divisors, whose sum is σ = 25520653092. Its totient is φ = 25520653090.

The previous prime is 25520653087. The next prime is 25520653127. The reversal of 25520653091 is 19035602552.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 25520653091 - 2² = 25520653087 is a prime.

It is not a weakly prime, because it can be changed into another prime (25520643091) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12760326545 + 12760326546.

It is an arithmetic number, because the mean of its divisors is an integer number (12760326546).

Almost surely, 2^25520653091 is an apocalyptic number.

25520653091 is a deficient number, since it is larger than the sum of its proper divisors (1).

25520653091 is an equidigital number, since it uses as much as digits as its factorization.

25520653091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 81000, while the sum is 38.

The spelling of 25520653091 in words is "twenty-five billion, five hundred twenty million, six hundred fifty-three thousand, ninety-one".