6819192445 has 8 divisors (see below), whose sum is σ = 8812494936. Its totient is φ = 5035711296.

The previous prime is 6819192437. The next prime is 6819192451. The reversal of 6819192445 is 5442919186.

It can be written as a sum of positive squares in 4 ways, for example, as 1253584836 + 5565607609 = 35406^2 + 74603^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 6819192445 - 2³ = 6819192437 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 52455262 + ... + 52455391.

It is an arithmetic number, because the mean of its divisors is an integer number (1101561867).

Almost surely, 2^6819192445 is an apocalyptic number.

6819192445 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

6819192445 is a deficient number, since it is larger than the sum of its proper divisors (1993302491).

6819192445 is a wasteful number, since it uses less digits than its factorization.

6819192445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104910671.

The product of its digits is 622080, while the sum is 49.

The square root of 6819192445 is about 82578.4018070100. The cubic root of 6819192445 is about 1896.3171916352.

The spelling of 6819192445 in words is "six billion, eight hundred nineteen million, one hundred ninety-two thousand, four hundred forty-five".