25320555012187 has 2 divisors, whose sum is σ = 25320555012188. Its totient is φ = 25320555012186.

The previous prime is 25320555012157. The next prime is 25320555012197. The reversal of 25320555012187 is 78121055502352.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25320555012187 is a prime.

It is a super-2 number, since 2×25320555012187² (a number of 28 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (25320555012127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12660277506093 + 12660277506094.

It is an arithmetic number, because the mean of its divisors is an integer number (12660277506094).

Almost surely, 2^{25320555012187} is an apocalyptic number.

25320555012187 is a deficient number, since it is larger than the sum of its proper divisors (1).

25320555012187 is an equidigital number, since it uses as much as digits as its factorization.

25320555012187 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 840000, while the sum is 46.

The spelling of 25320555012187 in words is "twenty-five trillion, three hundred twenty billion, five hundred fifty-five million, twelve thousand, one hundred eighty-seven".