2640388101 has 16 divisors (see below), whose sum is σ = 3795669696. Its totient is φ = 1622992896.

The previous prime is 2640388097. The next prime is 2640388147. The reversal of 2640388101 is 1018830462.

It is not a de Polignac number, because 2640388101 - 2² = 2640388097 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2640388301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3900 + ... + 72773.

It is an arithmetic number, because the mean of its divisors is an integer number (237229356).

Almost surely, 2^2640388101 is an apocalyptic number.

It is an amenable number.

2640388101 is a deficient number, since it is larger than the sum of its proper divisors (1155281595).

2640388101 is a wasteful number, since it uses less digits than its factorization.

2640388101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77572.

The product of its (nonzero) digits is 9216, while the sum is 33.

The square root of 2640388101 is about 51384.7068786035. The cubic root of 2640388101 is about 1382.1523684960.

The spelling of 2640388101 in words is "two billion, six hundred forty million, three hundred eighty-eight thousand, one hundred one".