138567245478 has 8 divisors (see below), whose sum is σ = 277134490968. Its totient is φ = 46189081824.

The previous prime is 138567245477. The next prime is 138567245507. The reversal of 138567245478 is 874542765831.

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

138567245478 is an admirable number.

It is a super-2 number, since 2×138567245478² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138567245477) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11547270451 + ... + 11547270462.

It is an arithmetic number, because the mean of its divisors is an integer number (34641811371).

Almost surely, 2^138567245478 is an apocalyptic number.

138567245478 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

138567245478 is a wasteful number, since it uses less digits than its factorization.

138567245478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23094540918.

The product of its digits is 45158400, while the sum is 60.

The spelling of 138567245478 in words is "one hundred thirty-eight billion, five hundred sixty-seven million, two hundred forty-five thousand, four hundred seventy-eight".