2640289899 has 16 divisors (see below), whose sum is σ = 3956020992. Its totient is φ = 1554150048.

The previous prime is 2640289877. The next prime is 2640289909. The reversal of 2640289899 is 9989820462.

It is not a de Polignac number, because 2640289899 - 2⁵ = 2640289867 is a prime.

It is a super-2 number, since 2×2640289899² = 13942261501522860402, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2640289819) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1470837 + ... + 1472630.

It is an arithmetic number, because the mean of its divisors is an integer number (247251312).

Almost surely, 2^2640289899 is an apocalyptic number.

2640289899 is a deficient number, since it is larger than the sum of its proper divisors (1315731093).

2640289899 is a wasteful number, since it uses less digits than its factorization.

2640289899 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2943506.

The product of its (nonzero) digits is 4478976, while the sum is 57.

The square root of 2640289899 is about 51383.7513130367. The cubic root of 2640289899 is about 1382.1352331603.

The spelling of 2640289899 in words is "two billion, six hundred forty million, two hundred eighty-nine thousand, eight hundred ninety-nine".