6412784721 has 16 divisors (see below), whose sum is σ = 10196726784. Its totient is φ = 3505124304.

The previous prime is 6412784717. The next prime is 6412784773. The reversal of 6412784721 is 1274872146.

It is not a de Polignac number, because 6412784721 - 2² = 6412784717 is a prime.

It is a super-2 number, since 2×6412784721² = 82247615755782095682, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (6412744721) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6638011 + ... + 6638976.

It is an arithmetic number, because the mean of its divisors is an integer number (637295424).

Almost surely, 2^6412784721 is an apocalyptic number.

It is an amenable number.

6412784721 is a deficient number, since it is larger than the sum of its proper divisors (3783942063).

6412784721 is a wasteful number, since it uses less digits than its factorization.

6412784721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13277020.

The product of its digits is 150528, while the sum is 42.

The square root of 6412784721 is about 80079.8646414940. The cubic root of 6412784721 is about 1857.8709907015.

The spelling of 6412784721 in words is "six billion, four hundred twelve million, seven hundred eighty-four thousand, seven hundred twenty-one".