3815294484581 has 2 divisors, whose sum is σ = 3815294484582. Its totient is φ = 3815294484580.

The previous prime is 3815294484577. The next prime is 3815294484601. The reversal of 3815294484581 is 1854844925183.

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., 3004918240900 + 810376243681 = 1733470^2 + 900209^2 .

It is an emirp because it is prime and its reverse (1854844925183) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 3815294484581 - 2² = 3815294484577 is a prime.

It is a super-2 number, since 2×3815294484581² (a number of 26 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3815294489581) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1907647242290 + 1907647242291.

It is an arithmetic number, because the mean of its divisors is an integer number (1907647242291).

Almost surely, 2^{3815294484581} is an apocalyptic number.

It is an amenable number.

3815294484581 is a deficient number, since it is larger than the sum of its proper divisors (1).

3815294484581 is an equidigital number, since it uses as much as digits as its factorization.

3815294484581 is an evil number, because the sum of its binary digits is even.

The product of its digits is 44236800, while the sum is 62.

The spelling of 3815294484581 in words is "three trillion, eight hundred fifteen billion, two hundred ninety-four million, four hundred eighty-four thousand, five hundred eighty-one".