2643436540 has 24 divisors (see below), whose sum is σ = 5583312000. Its totient is φ = 1051261248.

The previous prime is 2643436489. The next prime is 2643436553. The reversal of 2643436540 is 456343462.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 2643436540.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 378540 + ... + 385459.

It is an arithmetic number, because the mean of its divisors is an integer number (232638000).

Almost surely, 2^2643436540 is an apocalyptic number.

2643436540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2643436540 is an abundant number, since it is smaller than the sum of its proper divisors (2939875460).

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

2643436540 is a wasteful number, since it uses less digits than its factorization.

2643436540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 764181 (or 764179 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 37.

The square root of 2643436540 is about 51414.3612233002. The cubic root of 2643436540 is about 1382.6840815806.

The spelling of 2643436540 in words is "two billion, six hundred forty-three million, four hundred thirty-six thousand, five hundred forty".