6921343536 has 80 divisors (see below), whose sum is σ = 18109698048. Its totient is φ = 2277676800.

The previous prime is 6921343487. The next prime is 6921343547. The reversal of 6921343536 is 6353431296.

It is a happy number.

It is a Smith number, since the sum of its digits (42) 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 15 ways as a sum of consecutive naturals, for example, 1283566 + ... + 1288946.

Almost surely, 2^6921343536 is an apocalyptic number.

It is an amenable number.

6921343536 is an abundant number, since it is smaller than the sum of its proper divisors (11188354512).

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

6921343536 is a wasteful number, since it uses less digits than its factorization.

6921343536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5730 (or 5724 counting only the distinct ones).

The product of its digits is 349920, while the sum is 42.

The square root of 6921343536 is about 83194.6124217188. The cubic root of 6921343536 is about 1905.7392056890.

The spelling of 6921343536 in words is "six billion, nine hundred twenty-one million, three hundred forty-three thousand, five hundred thirty-six".