8138105770787 has 4 divisors (see below), whose sum is σ = 8229545161560. Its totient is φ = 8046666380016.

The previous prime is 8138105770757. The next prime is 8138105770807. The reversal of 8138105770787 is 7870775018318.

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

It is a cyclic number.

It is not a de Polignac number, because 8138105770787 - 2³⁴ = 8120925901603 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8138105770757) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 45719695253 + ... + 45719695430.

It is an arithmetic number, because the mean of its divisors is an integer number (2057386290390).

Almost surely, 2^{8138105770787} is an apocalyptic number.

8138105770787 is a deficient number, since it is larger than the sum of its proper divisors (91439390773).

8138105770787 is an equidigital number, since it uses as much as digits as its factorization.

8138105770787 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91439390772.

The product of its (nonzero) digits is 18439680, while the sum is 62.

The spelling of 8138105770787 in words is "eight trillion, one hundred thirty-eight billion, one hundred five million, seven hundred seventy thousand, seven hundred eighty-seven".