25840916278397 has 6 divisors (see below), whose sum is σ = 28403651777214. Its totient is φ = 23491742071160.

The previous prime is 25840916278381. The next prime is 25840916278421. The reversal of 25840916278397 is 79387261904852.

It can be written as a sum of positive squares in only one way, i.e., 14711413118116 + 11129503160281 = 3835546^2 + 3336091^2 .

It is not a de Polignac number, because 25840916278397 - 2⁴ = 25840916278381 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 25840916278397.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25840916278337) 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, 106780645658 + ... + 106780645899.

It is an arithmetic number, because the mean of its divisors is an integer number (4733941962869).

It is a 1-persistent number, because it is pandigital, but 2⋅25840916278397 = 51681832556794 is not.

Almost surely, 2^{25840916278397} is an apocalyptic number.

It is an amenable number.

25840916278397 is a deficient number, since it is larger than the sum of its proper divisors (2562735498817).

25840916278397 is a wasteful number, since it uses less digits than its factorization.

25840916278397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 213561291579 (or 213561291568 counting only the distinct ones).

The product of its (nonzero) digits is 365783040, while the sum is 71.

The spelling of 25840916278397 in words is "twenty-five trillion, eight hundred forty billion, nine hundred sixteen million, two hundred seventy-eight thousand, three hundred ninety-seven".