768691139186 has 4 divisors (see below), whose sum is σ = 1153036708782. Its totient is φ = 384345569592.

The previous prime is 768691139179. The next prime is 768691139197. The reversal of 768691139186 is 681931196867.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 642051240961 + 126639898225 = 801281^2 + 355865^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 192172784795 + ... + 192172784798.

Almost surely, 2^768691139186 is an apocalyptic number.

768691139186 is a deficient number, since it is larger than the sum of its proper divisors (384345569596).

768691139186 is a wasteful number, since it uses less digits than its factorization.

768691139186 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 384345569595.

The product of its digits is 23514624, while the sum is 65.

The spelling of 768691139186 in words is "seven hundred sixty-eight billion, six hundred ninety-one million, one hundred thirty-nine thousand, one hundred eighty-six".