138734231542 has 4 divisors (see below), whose sum is σ = 208101347316. Its totient is φ = 69367115770.

The previous prime is 138734231437. The next prime is 138734231557. The reversal of 138734231542 is 245132437831.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 245132437831 = 8731 ⋅28076101.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34683557884 + ... + 34683557887.

It is an arithmetic number, because the mean of its divisors is an integer number (52025336829).

Almost surely, 2^138734231542 is an apocalyptic number.

138734231542 is a deficient number, since it is larger than the sum of its proper divisors (69367115774).

138734231542 is an equidigital number, since it uses as much as digits as its factorization.

138734231542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69367115773.

The product of its digits is 483840, while the sum is 43.

The spelling of 138734231542 in words is "one hundred thirty-eight billion, seven hundred thirty-four million, two hundred thirty-one thousand, five hundred forty-two".