25438068192 has 24 divisors (see below), whose sum is σ = 66774929256. Its totient is φ = 8479356032.

The previous prime is 25438068113. The next prime is 25438068211. The reversal of 25438068192 is 29186083452.

It is a tau number, because it is divible by the number of its divisors (24).

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 132489843 + ... + 132490034.

It is an arithmetic number, because the mean of its divisors is an integer number (2782288719).

Almost surely, 2^25438068192 is an apocalyptic number.

It is an amenable number.

25438068192 is an abundant number, since it is smaller than the sum of its proper divisors (41336861064).

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

25438068192 is a wasteful number, since it uses less digits than its factorization.

25438068192 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 264979890 (or 264979882 counting only the distinct ones).

The product of its (nonzero) digits is 829440, while the sum is 48.

The spelling of 25438068192 in words is "twenty-five billion, four hundred thirty-eight million, sixty-eight thousand, one hundred ninety-two".