138459257000 has 32 divisors (see below), whose sum is σ = 323994663720. Its totient is φ = 55383702400.

The previous prime is 138459256987. The next prime is 138459257029. The reversal of 138459257000 is 752954831.

It can be written as a sum of positive squares in 4 ways, for example, as 72914040676 + 65545216324 = 270026^2 + 256018^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 69228629 + ... + 69230628.

Almost surely, 2^138459257000 is an apocalyptic number.

138459257000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

138459257000 is an abundant number, since it is smaller than the sum of its proper divisors (185535406720).

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

138459257000 is a wasteful number, since it uses less digits than its factorization.

138459257000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 138459278 (or 138459264 counting only the distinct ones).

The product of its (nonzero) digits is 302400, while the sum is 44.

The spelling of 138459257000 in words is "one hundred thirty-eight billion, four hundred fifty-nine million, two hundred fifty-seven thousand".