815693386741 has 2 divisors, whose sum is σ = 815693386742. Its totient is φ = 815693386740.

The previous prime is 815693386723. The next prime is 815693386829. The reversal of 815693386741 is 147683396518.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 745019291025 + 70674095716 = 863145^2 + 265846^2 .

It is a cyclic number.

It is not a de Polignac number, because 815693386741 - 2⁵ = 815693386709 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 815693386741.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (815693386441) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 407846693370 + 407846693371.

It is an arithmetic number, because the mean of its divisors is an integer number (407846693371).

Almost surely, 2^815693386741 is an apocalyptic number.

It is an amenable number.

815693386741 is a deficient number, since it is larger than the sum of its proper divisors (1).

815693386741 is an equidigital number, since it uses as much as digits as its factorization.

815693386741 is an evil number, because the sum of its binary digits is even.

The product of its digits is 26127360, while the sum is 61.

The spelling of 815693386741 in words is "eight hundred fifteen billion, six hundred ninety-three million, three hundred eighty-six thousand, seven hundred forty-one".