2640537437 has 8 divisors (see below), whose sum is σ = 2726740992. Its totient is φ = 2554398000.

The previous prime is 2640537401. The next prime is 2640537451. The reversal of 2640537437 is 7347350462.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2640537437 - 2²⁰ = 2639488861 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2640537394 and 2640537403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2640537457) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 76187 + ... + 105287.

It is an arithmetic number, because the mean of its divisors is an integer number (340842624).

Almost surely, 2^2640537437 is an apocalyptic number.

It is an amenable number.

2640537437 is a deficient number, since it is larger than the sum of its proper divisors (86203555).

2640537437 is a wasteful number, since it uses less digits than its factorization.

2640537437 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32059.

The product of its (nonzero) digits is 423360, while the sum is 41.

The square root of 2640537437 is about 51386.1599752307. The cubic root of 2640537437 is about 1382.1784254249.

Adding to 2640537437 its reverse (7347350462), we get a palindrome (9987887899).

The spelling of 2640537437 in words is "two billion, six hundred forty million, five hundred thirty-seven thousand, four hundred thirty-seven".