139945320218 has 16 divisors (see below), whose sum is σ = 229372608384. Its totient is φ = 63508404960.

The previous prime is 139945320217. The next prime is 139945320257. The reversal of 139945320218 is 812023549931.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (139945320217) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5141330 + ... + 5168477.

It is an arithmetic number, because the mean of its divisors is an integer number (14335788024).

Almost surely, 2^139945320218 is an apocalyptic number.

139945320218 is a deficient number, since it is larger than the sum of its proper divisors (89427288166).

139945320218 is a wasteful number, since it uses less digits than its factorization.

139945320218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10310437.

The product of its (nonzero) digits is 466560, while the sum is 47.

The spelling of 139945320218 in words is "one hundred thirty-nine billion, nine hundred forty-five million, three hundred twenty thousand, two hundred eighteen".