2640263851 has 2 divisors, whose sum is σ = 2640263852. Its totient is φ = 2640263850.

The previous prime is 2640263827. The next prime is 2640263881. The reversal of 2640263851 is 1583620462.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2640263851 - 2¹¹ = 2640261803 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2640263851.

It is not a weakly prime, because it can be changed into another prime (2640263881) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1320131925 + 1320131926.

It is an arithmetic number, because the mean of its divisors is an integer number (1320131926).

Almost surely, 2^2640263851 is an apocalyptic number.

2640263851 is a deficient number, since it is larger than the sum of its proper divisors (1).

2640263851 is an equidigital number, since it uses as much as digits as its factorization.

2640263851 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 69120, while the sum is 37.

The square root of 2640263851 is about 51383.4978470715. The cubic root of 2640263851 is about 1382.1306879553.

The spelling of 2640263851 in words is "two billion, six hundred forty million, two hundred sixty-three thousand, eight hundred fifty-one".