2640245212 has 24 divisors (see below), whose sum is σ = 5052145392. Its totient is φ = 1197331200.

The previous prime is 2640245183. The next prime is 2640245213. The reversal of 2640245212 is 2125420462.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2640245213) 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, 50239 + ... + 88342.

It is an arithmetic number, because the mean of its divisors is an integer number (210506058).

Almost surely, 2^2640245212 is an apocalyptic number.

2640245212 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

2640245212 is a deficient number, since it is larger than the sum of its proper divisors (2411900180).

2640245212 is a wasteful number, since it uses less digits than its factorization.

2640245212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 139029 (or 139027 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 28.

The square root of 2640245212 is about 51383.3164752919. The cubic root of 2640245212 is about 1382.1274355537.

Adding to 2640245212 its reverse (2125420462), we get a palindrome (4765665674).

The spelling of 2640245212 in words is "two billion, six hundred forty million, two hundred forty-five thousand, two hundred twelve".