812941665379 has 4 divisors (see below), whose sum is σ = 855728068840. Its totient is φ = 770155261920.

The previous prime is 812941665259. The next prime is 812941665391. The reversal of 812941665379 is 973566149218.

812941665379 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 812941665379 - 2⁷ = 812941665251 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (812941665479) 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, 21393201702 + ... + 21393201739.

It is an arithmetic number, because the mean of its divisors is an integer number (213932017210).

Almost surely, 2^812941665379 is an apocalyptic number.

812941665379 is a deficient number, since it is larger than the sum of its proper divisors (42786403461).

812941665379 is a wasteful number, since it uses less digits than its factorization.

812941665379 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42786403460.

The product of its digits is 19595520, while the sum is 61.

The spelling of 812941665379 in words is "eight hundred twelve billion, nine hundred forty-one million, six hundred sixty-five thousand, three hundred seventy-nine".