25025252547 has 16 divisors (see below), whose sum is σ = 34717134240. Its totient is φ = 16015087872.

The previous prime is 25025252423. The next prime is 25025252563. The reversal of 25025252547 is 74525252052.

It is a de Polignac number, because none of the positive numbers 2^k-25025252547 is a prime.

It is a super-2 number, since 2×25025252547² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (25025251547) 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, 816298 + ... + 846399.

It is an arithmetic number, because the mean of its divisors is an integer number (2169820890).

Almost surely, 2^25025252547 is an apocalyptic number.

25025252547 is a deficient number, since it is larger than the sum of its proper divisors (9691881693).

25025252547 is a wasteful number, since it uses less digits than its factorization.

25025252547 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1662902.

The product of its (nonzero) digits is 280000, while the sum is 39.

The spelling of 25025252547 in words is "twenty-five billion, twenty-five million, two hundred fifty-two thousand, five hundred forty-seven".