25493797387 has 16 divisors (see below), whose sum is σ = 27361838592. Its totient is φ = 23712363360.

The previous prime is 25493797331. The next prime is 25493797393. The reversal of 25493797387 is 78379739452.

It is a cyclic number.

It is not a de Polignac number, because 25493797387 - 2²⁷ = 25359579659 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25493797327) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 95689 + ... + 245242.

It is an arithmetic number, because the mean of its divisors is an integer number (1710114912).

Almost surely, 2^25493797387 is an apocalyptic number.

25493797387 is a deficient number, since it is larger than the sum of its proper divisors (1868041205).

25493797387 is a wasteful number, since it uses less digits than its factorization.

25493797387 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 341058.

The product of its digits is 80015040, while the sum is 64.

The spelling of 25493797387 in words is "twenty-five billion, four hundred ninety-three million, seven hundred ninety-seven thousand, three hundred eighty-seven".