2640691048 has 32 divisors (see below), whose sum is σ = 5138640000. Its totient is φ = 1270682560.

The previous prime is 2640690991. The next prime is 2640691049. The reversal of 2640691048 is 8401960462.

It is a self number, because there is not a number n which added to its sum of digits gives 2640691048.

It is not an unprimeable number, because it can be changed into a prime (2640691049) 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, 53853 + ... + 90451.

It is an arithmetic number, because the mean of its divisors is an integer number (160582500).

Almost surely, 2^2640691048 is an apocalyptic number.

It is an amenable number.

2640691048 is a deficient number, since it is larger than the sum of its proper divisors (2497948952).

2640691048 is a wasteful number, since it uses less digits than its factorization.

2640691048 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36945 (or 36941 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 40.

The square root of 2640691048 is about 51387.6546263789. The cubic root of 2640691048 is about 1382.2052272532.

The spelling of 2640691048 in words is "two billion, six hundred forty million, six hundred ninety-one thousand, forty-eight".