138147989544492 has 24 divisors (see below), whose sum is σ = 322433938488816. Its totient is φ = 46036668483648.

The previous prime is 138147989544491. The next prime is 138147989544557. The reversal of 138147989544492 is 294445989741831.

It is not an unprimeable number, because it can be changed into a prime (138147989544491) 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, 1582625103 + ... + 1582712390.

It is an arithmetic number, because the mean of its divisors is an integer number (13434747437034).

Almost surely, 2^{138147989544492} is an apocalyptic number.

138147989544492 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

138147989544492 is an abundant number, since it is smaller than the sum of its proper divisors (184285948944324).

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

138147989544492 is a wasteful number, since it uses less digits than its factorization.

138147989544492 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3165341137 (or 3165341135 counting only the distinct ones).

The product of its digits is 2508226560, while the sum is 78.

The spelling of 138147989544492 in words is "one hundred thirty-eight trillion, one hundred forty-seven billion, nine hundred eighty-nine million, five hundred forty-four thousand, four hundred ninety-two".