25000139025 has 24 divisors (see below), whose sum is σ = 45926182560. Its totient is φ = 13333407120.

The previous prime is 25000138979. The next prime is 25000139113. The reversal of 25000139025 is 52093100052.

25000139025 is a `hidden beast` number, since 2 + 500 + 0 + 139 + 0 + 25 = 666.

It is not a de Polignac number, because 25000139025 - 2¹⁷ = 25000007953 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a self number, because there is not a number n which added to its sum of digits gives 25000139025.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 18517947 + ... + 18519296.

It is an arithmetic number, because the mean of its divisors is an integer number (1913590940).

Almost surely, 2^25000139025 is an apocalyptic number.

25000139025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

25000139025 is a deficient number, since it is larger than the sum of its proper divisors (20926043535).

25000139025 is a wasteful number, since it uses less digits than its factorization.

25000139025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37037262 (or 37037251 counting only the distinct ones).

The product of its (nonzero) digits is 2700, while the sum is 27.

Adding to 25000139025 its reverse (52093100052), we get a palindrome (77093239077).

It can be divided in two parts, 25000 and 139025, that added together give a square (164025 = 405²).

The spelling of 25000139025 in words is "twenty-five billion, one hundred thirty-nine thousand, twenty-five".