25438146136 has 32 divisors (see below), whose sum is σ = 51403514400. Its totient is φ = 11731991040.

The previous prime is 25438146109. The next prime is 25438146199. The reversal of 25438146136 is 63164183452.

It is a junction number, because it is equal to n+sod(n) for n = 25438146092 and 25438146101.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 51685 + ... + 231403.

It is an arithmetic number, because the mean of its divisors is an integer number (1606359825).

Almost surely, 2^25438146136 is an apocalyptic number.

25438146136 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

25438146136 is an abundant number, since it is smaller than the sum of its proper divisors (25965368264).

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

25438146136 is a wasteful number, since it uses less digits than its factorization.

25438146136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 181099 (or 181095 counting only the distinct ones).

The product of its digits is 414720, while the sum is 43.

The spelling of 25438146136 in words is "twenty-five billion, four hundred thirty-eight million, one hundred forty-six thousand, one hundred thirty-six".