2640273437 has 2 divisors, whose sum is σ = 2640273438. Its totient is φ = 2640273436.

The previous prime is 2640273397. The next prime is 2640273443. The reversal of 2640273437 is 7343720462.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2518634596 + 121638841 = 50186^2 + 11029^2 .

It is a cyclic number.

It is not a de Polignac number, because 2640273437 - 2²⁸ = 2371837981 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2640273437.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2640273637) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1320136718 + 1320136719.

It is an arithmetic number, because the mean of its divisors is an integer number (1320136719).

Almost surely, 2^2640273437 is an apocalyptic number.

It is an amenable number.

2640273437 is a deficient number, since it is larger than the sum of its proper divisors (1).

2640273437 is an equidigital number, since it uses as much as digits as its factorization.

2640273437 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 169344, while the sum is 38.

The square root of 2640273437 is about 51383.5911259616. The cubic root of 2640273437 is about 1382.1323606528.

Adding to 2640273437 its reverse (7343720462), we get a palindrome (9983993899).

The spelling of 2640273437 in words is "two billion, six hundred forty million, two hundred seventy-three thousand, four hundred thirty-seven".