138286378494 has 64 divisors (see below), whose sum is σ = 337879572480. Its totient is φ = 41574980160.

The previous prime is 138286378411. The next prime is 138286378507. The reversal of 138286378494 is 494873682831.

138286378494 is a `hidden beast` number, since 1 + 3 + 82 + 8 + 63 + 7 + 8 + 494 = 666.

It is a super-3 number, since 3×138286378494³ (a number of 34 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 31 ways as a sum of consecutive naturals, for example, 841119 + ... + 991994.

It is an arithmetic number, because the mean of its divisors is an integer number (5279368320).

Almost surely, 2^138286378494 is an apocalyptic number.

138286378494 is an abundant number, since it is smaller than the sum of its proper divisors (199593193986).

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

138286378494 is a wasteful number, since it uses less digits than its factorization.

138286378494 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1833262 (or 1833256 counting only the distinct ones).

The product of its digits is 55738368, while the sum is 63.

The spelling of 138286378494 in words is "one hundred thirty-eight billion, two hundred eighty-six million, three hundred seventy-eight thousand, four hundred ninety-four".