6438854540 has 24 divisors (see below), whose sum is σ = 13645650480. Its totient is φ = 2551912128.

The previous prime is 6438854509. The next prime is 6438854593. The reversal of 6438854540 is 454588346.

It is a super-2 number, since 2×6438854540² = 82917695574557223200, which contains 22 as substring.

It is a Smith number, since the sum of its digits (47) coincides with the sum of the digits of its prime factors.

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, 1474622 + ... + 1478981.

It is an arithmetic number, because the mean of its divisors is an integer number (568568770).

Almost surely, 2^6438854540 is an apocalyptic number.

It is an amenable number.

6438854540 is an abundant number, since it is smaller than the sum of its proper divisors (7206795940).

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

6438854540 is a wasteful number, since it uses less digits than its factorization.

6438854540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2953721 (or 2953719 counting only the distinct ones).

The product of its (nonzero) digits is 1843200, while the sum is 47.

The square root of 6438854540 is about 80242.4734165143. The cubic root of 6438854540 is about 1860.3851805672.

The spelling of 6438854540 in words is "six billion, four hundred thirty-eight million, eight hundred fifty-four thousand, five hundred forty".