138890726650810 has 64 divisors (see below), whose sum is σ = 254594881134720. Its totient is φ = 54539533889280.

The previous prime is 138890726650789. The next prime is 138890726650811. The reversal of 138890726650810 is 18056627098831.

138890726650810 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×138890726650810² (a number of 29 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (138890726650811) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1194259024 + ... + 1194375316.

It is an arithmetic number, because the mean of its divisors is an integer number (3978045017730).

Almost surely, 2^{138890726650810} is an apocalyptic number.

138890726650810 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

138890726650810 is a deficient number, since it is larger than the sum of its proper divisors (115704154483910).

138890726650810 is a wasteful number, since it uses less digits than its factorization.

138890726650810 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 120143.

The product of its (nonzero) digits is 34836480, while the sum is 64.

The spelling of 138890726650810 in words is "one hundred thirty-eight trillion, eight hundred ninety billion, seven hundred twenty-six million, six hundred fifty thousand, eight hundred ten".