138685284754 has 8 divisors (see below), whose sum is σ = 208135552140. Its totient is φ = 69306767376.

The previous prime is 138685284737. The next prime is 138685284883. The reversal of 138685284754 is 457482586831.

It can be written as a sum of positive squares in 2 ways, for example, as 111699666225 + 26985618529 = 334215^2 + 164273^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 138685284692 and 138685284701.

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, 17932669 + ... + 17940400.

Almost surely, 2^138685284754 is an apocalyptic number.

138685284754 is a deficient number, since it is larger than the sum of its proper divisors (69450267386).

138685284754 is a wasteful number, since it uses less digits than its factorization.

138685284754 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35875004.

The product of its digits is 51609600, while the sum is 61.

The spelling of 138685284754 in words is "one hundred thirty-eight billion, six hundred eighty-five million, two hundred eighty-four thousand, seven hundred fifty-four".