137742684238 has 4 divisors (see below), whose sum is σ = 206614026360. Its totient is φ = 68871342118.

The previous prime is 137742684227. The next prime is 137742684239. The reversal of 137742684238 is 832486247731.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 832486247731 = 11909 ⋅69903959.

It is a super-2 number, since 2×137742684238² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (137742684239) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34435671058 + ... + 34435671061.

It is an arithmetic number, because the mean of its divisors is an integer number (51653506590).

Almost surely, 2^137742684238 is an apocalyptic number.

137742684238 is a deficient number, since it is larger than the sum of its proper divisors (68871342122).

137742684238 is an equidigital number, since it uses as much as digits as its factorization.

137742684238 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68871342121.

The product of its digits is 10838016, while the sum is 55.

The spelling of 137742684238 in words is "one hundred thirty-seven billion, seven hundred forty-two million, six hundred eighty-four thousand, two hundred thirty-eight".