25520637223 has 2 divisors, whose sum is σ = 25520637224. Its totient is φ = 25520637222.

The previous prime is 25520637209. The next prime is 25520637281. The reversal of 25520637223 is 32273602552.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 25520637223 - 2⁹ = 25520636711 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25520637323) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12760318611 + 12760318612.

It is an arithmetic number, because the mean of its divisors is an integer number (12760318612).

Almost surely, 2^25520637223 is an apocalyptic number.

25520637223 is a deficient number, since it is larger than the sum of its proper divisors (1).

25520637223 is an equidigital number, since it uses as much as digits as its factorization.

25520637223 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 151200, while the sum is 37.

The spelling of 25520637223 in words is "twenty-five billion, five hundred twenty million, six hundred thirty-seven thousand, two hundred twenty-three".