2643075640 has 32 divisors (see below), whose sum is σ = 5969052000. Its totient is φ = 1053295744.

The previous prime is 2643075583. The next prime is 2643075641. The reversal of 2643075640 is 465703462.

It is a super-2 number, since 2×2643075640² = 13971697677522819200, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2643075640.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2643075641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 112060 + ... + 133579.

It is an arithmetic number, because the mean of its divisors is an integer number (186532875).

Almost surely, 2^2643075640 is an apocalyptic number.

2643075640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2643075640 is an abundant number, since it is smaller than the sum of its proper divisors (3325976360).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2643075640 is a wasteful number, since it uses less digits than its factorization.

2643075640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 245919 (or 245915 counting only the distinct ones).

The product of its (nonzero) digits is 120960, while the sum is 37.

The square root of 2643075640 is about 51410.8513837303. The cubic root of 2643075640 is about 1382.6211542272.

The spelling of 2643075640 in words is "two billion, six hundred forty-three million, seventy-five thousand, six hundred forty".