25840916278398 has 40 divisors (see below), whose sum is σ = 62356854956088. Its totient is φ = 7951051161936.

The previous prime is 25840916278381. The next prime is 25840916278421. The reversal of 25840916278398 is 89387261904852.

25840916278398 is a `hidden beast` number, since 2 + 5 + 8 + 4 + 0 + 9 + 162 + 78 + 398 = 666.

It is a super-3 number, since 3×25840916278398³ (a number of 41 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 6135068236 + ... + 6135072447.

It is a 1-persistent number, because it is pandigital, but 2⋅25840916278398 = 51681832556796 is not.

Almost surely, 2^{25840916278398} is an apocalyptic number.

25840916278398 is an abundant number, since it is smaller than the sum of its proper divisors (36515938677690).

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

25840916278398 is a wasteful number, since it uses less digits than its factorization.

25840916278398 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12270140710 (or 12270140701 counting only the distinct ones).

The product of its (nonzero) digits is 418037760, while the sum is 72.

The spelling of 25840916278398 in words is "twenty-five trillion, eight hundred forty billion, nine hundred sixteen million, two hundred seventy-eight thousand, three hundred ninety-eight".