25040215165 has 16 divisors (see below), whose sum is σ = 34378606080. Its totient is φ = 17151563520.

The previous prime is 25040215153. The next prime is 25040215169. The reversal of 25040215165 is 56151204052.

It is not a de Polignac number, because 25040215165 - 2⁷ = 25040215037 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25040215169) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 360780 + ... + 424549.

It is an arithmetic number, because the mean of its divisors is an integer number (2148662880).

Almost surely, 2^25040215165 is an apocalyptic number.

It is an amenable number.

25040215165 is a deficient number, since it is larger than the sum of its proper divisors (9338390915).

25040215165 is an equidigital number, since it uses as much as digits as its factorization.

25040215165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 786252.

The product of its (nonzero) digits is 12000, while the sum is 31.

The spelling of 25040215165 in words is "twenty-five billion, forty million, two hundred fifteen thousand, one hundred sixty-five".