813241951619 has 2 divisors, whose sum is σ = 813241951620. Its totient is φ = 813241951618.

The previous prime is 813241951607. The next prime is 813241951741. The reversal of 813241951619 is 916159142318.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-813241951619 is a prime.

It is a super-2 number, since 2×813241951619² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (813241951019) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 406620975809 + 406620975810.

It is an arithmetic number, because the mean of its divisors is an integer number (406620975810).

Almost surely, 2^813241951619 is an apocalyptic number.

813241951619 is a deficient number, since it is larger than the sum of its proper divisors (1).

813241951619 is an equidigital number, since it uses as much as digits as its factorization.

813241951619 is an evil number, because the sum of its binary digits is even.

The product of its digits is 466560, while the sum is 50.

The spelling of 813241951619 in words is "eight hundred thirteen billion, two hundred forty-one million, nine hundred fifty-one thousand, six hundred nineteen".