25434400788625 has 8 divisors (see below), whose sum is σ = 31742132184360. Its totient is φ = 20347520630800.

The previous prime is 25434400788623. The next prime is 25434400788733. The reversal of 25434400788625 is 52688700443452.

It can be written as a sum of positive squares in 4 ways, for example, as 3458294403201 + 21976106385424 = 1859649^2 + 4687868^2 .

It is not a de Polignac number, because 25434400788625 - 2¹ = 25434400788623 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 25434400788625.

It is not an unprimeable number, because it can be changed into a prime (25434400788623) 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 7 ways as a sum of consecutive naturals, for example, 101737603030 + ... + 101737603279.

It is an arithmetic number, because the mean of its divisors is an integer number (3967766523045).

Almost surely, 2^{25434400788625} is an apocalyptic number.

25434400788625 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

25434400788625 is a deficient number, since it is larger than the sum of its proper divisors (6307731395735).

25434400788625 is an equidigital number, since it uses as much as digits as its factorization.

25434400788625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 203475206324 (or 203475206314 counting only the distinct ones).

The product of its (nonzero) digits is 51609600, while the sum is 58.

The spelling of 25434400788625 in words is "twenty-five trillion, four hundred thirty-four billion, four hundred million, seven hundred eighty-eight thousand, six hundred twenty-five".