138480890544 has 60 divisors (see below), whose sum is σ = 401908027976. Its totient is φ = 46160295552.

The previous prime is 138480890477. The next prime is 138480890549. The reversal of 138480890544 is 445098084831.

It is a happy number.

138480890544 is a `hidden beast` number, since 1 + 3 + 8 + 4 + 8 + 0 + 8 + 90 + 544 = 666.

It is a Smith number, since the sum of its digits (54) 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 (54).

It is not an unprimeable number, because it can be changed into a prime (138480890549) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 17804869 + ... + 17812644.

Almost surely, 2^138480890544 is an apocalyptic number.

It is an amenable number.

138480890544 is an abundant number, since it is smaller than the sum of its proper divisors (263427137432).

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

138480890544 is an equidigital number, since it uses as much as digits as its factorization.

138480890544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35617536 (or 35617518 counting only the distinct ones).

The product of its (nonzero) digits is 4423680, while the sum is 54.

The spelling of 138480890544 in words is "one hundred thirty-eight billion, four hundred eighty million, eight hundred ninety thousand, five hundred forty-four".