6893646621 has 16 divisors (see below), whose sum is σ = 9241436160. Its totient is φ = 4570841520.

The previous prime is 6893646593. The next prime is 6893646623. The reversal of 6893646621 is 1266463986.

It is a happy number.

It is not a de Polignac number, because 6893646621 - 2³¹ = 4746162973 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6893646623) 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, 1249956 + ... + 1255458.

It is an arithmetic number, because the mean of its divisors is an integer number (577589760).

Almost surely, 2^6893646621 is an apocalyptic number.

It is an amenable number.

6893646621 is a deficient number, since it is larger than the sum of its proper divisors (2347789539).

6893646621 is a wasteful number, since it uses less digits than its factorization.

6893646621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7696.

The product of its digits is 2239488, while the sum is 51.

The square root of 6893646621 is about 83027.9869742727. The cubic root of 6893646621 is about 1903.1937624881.

The spelling of 6893646621 in words is "six billion, eight hundred ninety-three million, six hundred forty-six thousand, six hundred twenty-one".