6440548870 has 32 divisors (see below), whose sum is σ = 13499120448. Its totient is φ = 2166523008.

The previous prime is 6440548859. The next prime is 6440548927. The reversal of 6440548870 is 788450446.

It is a self number, because there is not a number n which added to its sum of digits gives 6440548870.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 864289 + ... + 871708.

It is an arithmetic number, because the mean of its divisors is an integer number (421847514).

Almost surely, 2^6440548870 is an apocalyptic number.

6440548870 is an abundant number, since it is smaller than the sum of its proper divisors (7058571578).

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

6440548870 is a wasteful number, since it uses less digits than its factorization.

6440548870 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1736064.

The product of its (nonzero) digits is 860160, while the sum is 46.

The square root of 6440548870 is about 80253.0302854665. The cubic root of 6440548870 is about 1860.5483477869.

The spelling of 6440548870 in words is "six billion, four hundred forty million, five hundred forty-eight thousand, eight hundred seventy".