6745182921 has 6 divisors (see below), whose sum is σ = 9743042010. Its totient is φ = 4496788608.

The previous prime is 6745182881. The next prime is 6745182923. The reversal of 6745182921 is 1292815476.

It can be written as a sum of positive squares in only one way, i.e., 5007543696 + 1737639225 = 70764^2 + 41685^2 .

It is not a de Polignac number, because 6745182921 - 2⁷ = 6745182793 is a prime.

It is not an unprimeable number, because it can be changed into a prime (6745182923) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 374732376 + ... + 374732393.

It is an arithmetic number, because the mean of its divisors is an integer number (1623840335).

Almost surely, 2^6745182921 is an apocalyptic number.

It is an amenable number.

6745182921 is a deficient number, since it is larger than the sum of its proper divisors (2997859089).

6745182921 is a wasteful number, since it uses less digits than its factorization.

6745182921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 749464775 (or 749464772 counting only the distinct ones).

The product of its digits is 241920, while the sum is 45.

The square root of 6745182921 is about 82129.0625844469. The cubic root of 6745182921 is about 1889.4319019880.

The spelling of 6745182921 in words is "six billion, seven hundred forty-five million, one hundred eighty-two thousand, nine hundred twenty-one".