6475381331 has 2 divisors, whose sum is σ = 6475381332. Its totient is φ = 6475381330.

The previous prime is 6475381327. The next prime is 6475381349. The reversal of 6475381331 is 1331835746.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 6475381331 - 2² = 6475381327 is a prime.

It is a super-2 number, since 2×6475381331² = 83861126763726663122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (6475381301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3237690665 + 3237690666.

It is an arithmetic number, because the mean of its divisors is an integer number (3237690666).

Almost surely, 2^6475381331 is an apocalyptic number.

6475381331 is a deficient number, since it is larger than the sum of its proper divisors (1).

6475381331 is an equidigital number, since it uses as much as digits as its factorization.

6475381331 is an evil number, because the sum of its binary digits is even.

The product of its digits is 181440, while the sum is 41.

The square root of 6475381331 is about 80469.7541378125. The cubic root of 6475381331 is about 1863.8964576012.

The spelling of 6475381331 in words is "six billion, four hundred seventy-five million, three hundred eighty-one thousand, three hundred thirty-one".