2643431280 has 160 divisors (see below), whose sum is σ = 9524390400. Its totient is φ = 593949696.

The previous prime is 2643431159. The next prime is 2643431299. The reversal of 2643431280 is 821343462.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 85786 + ... + 112454.

It is an arithmetic number, because the mean of its divisors is an integer number (59527440).

Almost surely, 2^2643431280 is an apocalyptic number.

2643431280 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2643431280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4762195200).

2643431280 is an abundant number, since it is smaller than the sum of its proper divisors (6880959120).

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

2643431280 is a wasteful number, since it uses less digits than its factorization.

2643431280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26751 (or 26745 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 33.

The square root of 2643431280 is about 51414.3100702518. The cubic root of 2643431280 is about 1382.6831644760.

The spelling of 2643431280 in words is "two billion, six hundred forty-three million, four hundred thirty-one thousand, two hundred eighty".