25437384425 has 6 divisors (see below), whose sum is σ = 31542356718. Its totient is φ = 20349907520.

The previous prime is 25437384421. The next prime is 25437384437. The reversal of 25437384425 is 52448373452.

It can be written as a sum of positive squares in 3 ways, for example, as 336685801 + 25100698624 = 18349^2 + 158432^2 .

It is not a de Polignac number, because 25437384425 - 2² = 25437384421 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 25437384425.

It is not an unprimeable number, because it can be changed into a prime (25437384421) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 508747664 + ... + 508747713.

It is an arithmetic number, because the mean of its divisors is an integer number (5257059453).

Almost surely, 2^25437384425 is an apocalyptic number.

25437384425 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

25437384425 is a deficient number, since it is larger than the sum of its proper divisors (6104972293).

25437384425 is a wasteful number, since it uses less digits than its factorization.

25437384425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1017495387 (or 1017495382 counting only the distinct ones).

The product of its digits is 3225600, while the sum is 47.

The spelling of 25437384425 in words is "twenty-five billion, four hundred thirty-seven million, three hundred eighty-four thousand, four hundred twenty-five".