2640643363 has 8 divisors (see below), whose sum is σ = 2766988800. Its totient is φ = 2515259208.

The previous prime is 2640643361. The next prime is 2640643367. The reversal of 2640643363 is 3633460462.

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

It is not a de Polignac number, because 2640643363 - 2¹ = 2640643361 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2640643361) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 234693 + ... + 245686.

It is an arithmetic number, because the mean of its divisors is an integer number (345873600).

Almost surely, 2^2640643363 is an apocalyptic number.

2640643363 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

2640643363 is a deficient number, since it is larger than the sum of its proper divisors (126345437).

2640643363 is a wasteful number, since it uses less digits than its factorization.

2640643363 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 480641.

The product of its (nonzero) digits is 186624, while the sum is 37.

The square root of 2640643363 is about 51387.1906509784. The cubic root of 2640643363 is about 1382.1969073537.

The spelling of 2640643363 in words is "two billion, six hundred forty million, six hundred forty-three thousand, three hundred sixty-three".