2640330461 has 2 divisors, whose sum is σ = 2640330462. Its totient is φ = 2640330460.

The previous prime is 2640330457. The next prime is 2640330467. The reversal of 2640330461 is 1640330462.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2402862361 + 237468100 = 49019^2 + 15410^2 .

It is a cyclic number.

It is not a de Polignac number, because 2640330461 - 2² = 2640330457 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2640330467) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1320165230 + 1320165231.

It is an arithmetic number, because the mean of its divisors is an integer number (1320165231).

Almost surely, 2^2640330461 is an apocalyptic number.

It is an amenable number.

2640330461 is a deficient number, since it is larger than the sum of its proper divisors (1).

2640330461 is an equidigital number, since it uses as much as digits as its factorization.

2640330461 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10368, while the sum is 29.

The square root of 2640330461 is about 51384.1460082777. The cubic root of 2640330461 is about 1382.1423109036.

Subtracting from 2640330461 its reverse (1640330462), we obtain a palindrome (999999999).

The spelling of 2640330461 in words is "two billion, six hundred forty million, three hundred thirty thousand, four hundred sixty-one".