138888407763 has 48 divisors (see below), whose sum is σ = 242821575360. Its totient is φ = 74678243328.

The previous prime is 138888407761. The next prime is 138888407767. The reversal of 138888407763 is 367704888831.

138888407763 is a `hidden beast` number, since 1 + 3 + 88 + 88 + 407 + 76 + 3 = 666.

It is not a de Polignac number, because 138888407763 - 2¹ = 138888407761 is a prime.

It is a Smith number, since the sum of its digits (63) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a self number, because there is not a number n which added to its sum of digits gives 138888407763.

It is not an unprimeable number, because it can be changed into a prime (138888407761) 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, 5244331 + ... + 5270747.

It is an arithmetic number, because the mean of its divisors is an integer number (5058782820).

Almost surely, 2^138888407763 is an apocalyptic number.

138888407763 is a deficient number, since it is larger than the sum of its proper divisors (103933167597).

138888407763 is a wasteful number, since it uses less digits than its factorization.

138888407763 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31356 (or 31353 counting only the distinct ones).

The product of its (nonzero) digits is 43352064, while the sum is 63.

The spelling of 138888407763 in words is "one hundred thirty-eight billion, eight hundred eighty-eight million, four hundred seven thousand, seven hundred sixty-three".