138712026776678 has 8 divisors (see below), whose sum is σ = 209146112912568. Its totient is φ = 68996655805824.

The previous prime is 138712026776657. The next prime is 138712026776681. The reversal of 138712026776678 is 876677620217831.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 179678790776 + ... + 179678791547.

It is an arithmetic number, because the mean of its divisors is an integer number (26143264114071).

Almost surely, 2^{138712026776678} is an apocalyptic number.

138712026776678 is a deficient number, since it is larger than the sum of its proper divisors (70434086135890).

138712026776678 is a wasteful number, since it uses less digits than its factorization.

138712026776678 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 359357582518.

The product of its (nonzero) digits is 398297088, while the sum is 71.

The spelling of 138712026776678 in words is "one hundred thirty-eight trillion, seven hundred twelve billion, twenty-six million, seven hundred seventy-six thousand, six hundred seventy-eight".