25897400319 has 8 divisors (see below), whose sum is σ = 39462705280. Its totient is φ = 14798514456.

The previous prime is 25897400281. The next prime is 25897400329. The reversal of 25897400319 is 91300479852.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 25897400319 - 2¹² = 25897396223 is a prime.

It is a super-2 number, since 2×25897400319² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25897400329) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 616604749 + ... + 616604790.

It is an arithmetic number, because the mean of its divisors is an integer number (4932838160).

Almost surely, 2^25897400319 is an apocalyptic number.

25897400319 is a deficient number, since it is larger than the sum of its proper divisors (13565304961).

25897400319 is a wasteful number, since it uses less digits than its factorization.

25897400319 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1233209549.

The product of its (nonzero) digits is 544320, while the sum is 48.

The spelling of 25897400319 in words is "twenty-five billion, eight hundred ninety-seven million, four hundred thousand, three hundred nineteen".