25423220145015 has 48 divisors (see below), whose sum is σ = 54940569255936. Its totient is φ = 10565494084800.

The previous prime is 25423220144989. The next prime is 25423220145017. The reversal of 25423220145015 is 51054102232452.

25423220145015 is a `hidden beast` number, since 2 + 5 + 423 + 220 + 1 + 4 + 5 + 0 + 1 + 5 = 666.

It is not a de Polignac number, because 25423220145015 - 2⁷ = 25423220144887 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25423220145017) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3668570871 + ... + 3668577800.

It is an arithmetic number, because the mean of its divisors is an integer number (1144595192832).

Almost surely, 2^{25423220145015} is an apocalyptic number.

25423220145015 is an abundant number, since it is smaller than the sum of its proper divisors (29517349110921).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

25423220145015 is a wasteful number, since it uses less digits than its factorization.

25423220145015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7337148700 (or 7337148697 counting only the distinct ones).

The product of its (nonzero) digits is 96000, while the sum is 36.

Adding to 25423220145015 its reverse (51054102232452), we get a palindrome (76477322377467).

The spelling of 25423220145015 in words is "twenty-five trillion, four hundred twenty-three billion, two hundred twenty million, one hundred forty-five thousand, fifteen".