6411991822649 has 4 divisors (see below), whose sum is σ = 7327990654464. Its totient is φ = 5495992990836.

The previous prime is 6411991822633. The next prime is 6411991822661. The reversal of 6411991822649 is 9462281991146.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 6411991822649 - 2⁴ = 6411991822633 is a prime.

It is a super-2 number, since 2×6411991822649² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 6411991822591 and 6411991822600.

It is not an unprimeable number, because it can be changed into a prime (6411991822669) 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, 457999415897 + ... + 457999415910.

It is an arithmetic number, because the mean of its divisors is an integer number (1831997663616).

Almost surely, 2^{6411991822649} is an apocalyptic number.

It is an amenable number.

6411991822649 is a deficient number, since it is larger than the sum of its proper divisors (915998831815).

6411991822649 is an equidigital number, since it uses as much as digits as its factorization.

6411991822649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 915998831814.

The product of its digits is 13436928, while the sum is 62.

The spelling of 6411991822649 in words is "six trillion, four hundred eleven billion, nine hundred ninety-one million, eight hundred twenty-two thousand, six hundred forty-nine".