138763877640 has 32 divisors (see below), whose sum is σ = 416291633280. Its totient is φ = 37003700672.

The previous prime is 138763877597. The next prime is 138763877669. The reversal of 138763877640 is 46778367831.

It is a Harshad number since it is a multiple of its sum of digits (60).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 578182704 + ... + 578182943.

It is an arithmetic number, because the mean of its divisors is an integer number (13009113540).

Almost surely, 2^138763877640 is an apocalyptic number.

138763877640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

138763877640 is an abundant number, since it is smaller than the sum of its proper divisors (277527755640).

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

138763877640 is a wasteful number, since it uses less digits than its factorization.

138763877640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1156365661 (or 1156365657 counting only the distinct ones).

The product of its (nonzero) digits is 28449792, while the sum is 60.

The spelling of 138763877640 in words is "one hundred thirty-eight billion, seven hundred sixty-three million, eight hundred seventy-seven thousand, six hundred forty".