6943472640 has 528 divisors, whose sum is σ = 26448353568. Its totient is φ = 1673920512.

The previous prime is 6943472621. The next prime is 6943472663. The reversal of 6943472640 is 462743496.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 40135594 + ... + 40135766.

Almost surely, 2^6943472640 is an apocalyptic number.

6943472640 is a gapful number since it is divisible by the number (60) 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 6943472640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13224176784).

6943472640 is an abundant number, since it is smaller than the sum of its proper divisors (19504880928).

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

6943472640 is a wasteful number, since it uses less digits than its factorization.

6943472640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 284 (or 263 counting only the distinct ones).

The product of its (nonzero) digits is 870912, while the sum is 45.

The square root of 6943472640 is about 83327.5023026612. The cubic root of 6943472640 is about 1907.7680716995.

The spelling of 6943472640 in words is "six billion, nine hundred forty-three million, four hundred seventy-two thousand, six hundred forty".