25897381446 has 16 divisors (see below), whose sum is σ = 52376727600. Its totient is φ = 8535466368.

The previous prime is 25897381441. The next prime is 25897381451. The reversal of 25897381446 is 64418379852.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (25897381441) and next prime (25897381451).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25897381441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24247951 + ... + 24249018.

It is an arithmetic number, because the mean of its divisors is an integer number (3273545475).

Almost surely, 2^25897381446 is an apocalyptic number.

25897381446 is an abundant number, since it is smaller than the sum of its proper divisors (26479346154).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

25897381446 is a wasteful number, since it uses less digits than its factorization.

25897381446 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48497063.

The product of its digits is 11612160, while the sum is 57.

The spelling of 25897381446 in words is "twenty-five billion, eight hundred ninety-seven million, three hundred eighty-one thousand, four hundred forty-six".