6743946741921 has 9 divisors (see below), whose sum is σ = 9741267658291. Its totient is φ = 4495959300792.

The previous prime is 6743946741827. The next prime is 6743946741977. The reversal of 6743946741921 is 1291476493476.

The square root of 6743946741921 is 2596911.

It is a perfect power (a square), and thus also a powerful number.

6743946741921 is a `hidden beast` number, since 6 + 7 + 43 + 9 + 467 + 41 + 92 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 3945566459025 + 2798380282896 = 1986345^2 + 1672836^2 .

It is a tau number, because it is divible by the number of its divisors (9).

It is not a de Polignac number, because 6743946741921 - 2³³ = 6735356807329 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6743946743921) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 7357915 + ... + 8223551.

Almost surely, 2^{6743946741921} is an apocalyptic number.

6743946741921 is the 2596911-st square number.

6743946741921 is the 1298456-th centered octagonal number.

It is an amenable number.

6743946741921 is a deficient number, since it is larger than the sum of its proper divisors (2997320916370).

6743946741921 is an frugal number, since it uses more digits than its factorization.

6743946741921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1731280 (or 865640 counting only the distinct ones).

The product of its digits is 54867456, while the sum is 63.

The spelling of 6743946741921 in words is "six trillion, seven hundred forty-three billion, nine hundred forty-six million, seven hundred forty-one thousand, nine hundred twenty-one".