138772662813 has 48 divisors (see below), whose sum is σ = 209237608944. Its totient is φ = 88557649920.

The previous prime is 138772662811. The next prime is 138772662817. The reversal of 138772662813 is 318266277831.

It is a happy number.

138772662813 is a `hidden beast` number, since 1 + 3 + 8 + 7 + 7 + 2 + 6 + 628 + 1 + 3 = 666.

It can be written as a sum of positive squares in 8 ways, for example, as 65107646244 + 73665016569 = 255162^2 + 271413^2 .

It is not a de Polignac number, because 138772662813 - 2¹ = 138772662811 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 138772662813.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138772662811) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 5185495 + ... + 5212187.

It is an arithmetic number, because the mean of its divisors is an integer number (4359116853).

Almost surely, 2^138772662813 is an apocalyptic number.

It is an amenable number.

138772662813 is a deficient number, since it is larger than the sum of its proper divisors (70464946131).

138772662813 is a wasteful number, since it uses less digits than its factorization.

138772662813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27006 (or 27003 counting only the distinct ones).

The product of its digits is 4064256, while the sum is 54.

The spelling of 138772662813 in words is "one hundred thirty-eight billion, seven hundred seventy-two million, six hundred sixty-two thousand, eight hundred thirteen".