2640652063 has 4 divisors (see below), whose sum is σ = 3017888080. Its totient is φ = 2263416048.

The previous prime is 2640652051. The next prime is 2640652067. The reversal of 2640652063 is 3602560462.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3602560462 = 2 ⋅1801280231.

It is a cyclic number.

It is not a de Polignac number, because 2640652063 - 2²⁵ = 2607097631 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2640652067) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 188617998 + ... + 188618011.

It is an arithmetic number, because the mean of its divisors is an integer number (754472020).

Almost surely, 2^2640652063 is an apocalyptic number.

2640652063 is a deficient number, since it is larger than the sum of its proper divisors (377236017).

2640652063 is an equidigital number, since it uses as much as digits as its factorization.

2640652063 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 377236016.

The product of its (nonzero) digits is 51840, while the sum is 34.

The square root of 2640652063 is about 51387.2753023548. The cubic root of 2640652063 is about 1382.1984253044.

The spelling of 2640652063 in words is "two billion, six hundred forty million, six hundred fifty-two thousand, sixty-three".