25145550507 has 48 divisors (see below), whose sum is σ = 42176347136. Its totient is φ = 13044240000.

The previous prime is 25145550491. The next prime is 25145550509. The reversal of 25145550507 is 70505554152.

It is not a de Polignac number, because 25145550507 - 2⁴ = 25145550491 is a prime.

It is not an unprimeable number, because it can be changed into a prime (25145550509) 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, 1901703 + ... + 1914879.

Almost surely, 2^25145550507 is an apocalyptic number.

25145550507 is a deficient number, since it is larger than the sum of its proper divisors (17030796629).

25145550507 is a wasteful number, since it uses less digits than its factorization.

25145550507 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13960 (or 13949 counting only the distinct ones).

The product of its (nonzero) digits is 175000, while the sum is 39.

The spelling of 25145550507 in words is "twenty-five billion, one hundred forty-five million, five hundred fifty thousand, five hundred seven".