83768771386 has 4 divisors (see below), whose sum is σ = 125653157082. Its totient is φ = 41884385692.

The previous prime is 83768771371. The next prime is 83768771399. The reversal of 83768771386 is 68317786738.

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., 80823647025 + 2945124361 = 284295^2 + 54269^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20942192845 + ... + 20942192848.

Almost surely, 2^83768771386 is an apocalyptic number.

83768771386 is a deficient number, since it is larger than the sum of its proper divisors (41884385696).

83768771386 is a wasteful number, since it uses less digits than its factorization.

83768771386 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41884385695.

The product of its digits is 56899584, while the sum is 64.

The spelling of 83768771386 in words is "eighty-three billion, seven hundred sixty-eight million, seven hundred seventy-one thousand, three hundred eighty-six".