137686136786 has 32 divisors (see below), whose sum is σ = 225749099520. Its totient is φ = 62461270800.

The previous prime is 137686136747. The next prime is 137686136807. The reversal of 137686136786 is 687631686731.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 30547145 + ... + 30551651.

It is an arithmetic number, because the mean of its divisors is an integer number (7054659360).

Almost surely, 2^137686136786 is an apocalyptic number.

137686136786 is a deficient number, since it is larger than the sum of its proper divisors (88062962734).

137686136786 is a wasteful number, since it uses less digits than its factorization.

137686136786 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6950.

The product of its digits is 36578304, while the sum is 62.

Subtracting 137686136786 from its reverse (687631686731), we obtain a palindrome (549945549945).

It can be divided in two parts, 137686 and 136786, that added together give a palindrome (274472).

The spelling of 137686136786 in words is "one hundred thirty-seven billion, six hundred eighty-six million, one hundred thirty-six thousand, seven hundred eighty-six".