6921795384 has 80 divisors (see below), whose sum is σ = 22157084400. Its totient is φ = 1977654528.

The previous prime is 6921795383. The next prime is 6921795401. The reversal of 6921795384 is 4835971296.

6921795384 is a `hidden beast` number, since 6 + 92 + 17 + 9 + 538 + 4 = 666.

It is a super-2 number, since 2×6921795384² = 95822502675927414912, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a self number, because there is not a number n which added to its sum of digits gives 6921795384.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6921795383) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 758449 + ... + 767520.

It is an arithmetic number, because the mean of its divisors is an integer number (276963555).

Almost surely, 2^6921795384 is an apocalyptic number.

It is an amenable number.

6921795384 is an abundant number, since it is smaller than the sum of its proper divisors (15235289016).

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

6921795384 is a wasteful number, since it uses less digits than its factorization.

6921795384 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1525994 (or 1525981 counting only the distinct ones).

The product of its digits is 3265920, while the sum is 54.

The square root of 6921795384 is about 83197.3279859395. The cubic root of 6921795384 is about 1905.7806757546.

The spelling of 6921795384 in words is "six billion, nine hundred twenty-one million, seven hundred ninety-five thousand, three hundred eighty-four".