6749837093721 has 4 divisors (see below), whose sum is σ = 8999782791632. Its totient is φ = 4499891395812.

The previous prime is 6749837093717. The next prime is 6749837093731. The reversal of 6749837093721 is 1273907389476.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 6749837093721 - 2² = 6749837093717 is a prime.

It is a super-3 number, since 3×6749837093721³ (a number of 39 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6749837093731) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1124972848951 + ... + 1124972848956.

It is an arithmetic number, because the mean of its divisors is an integer number (2249945697908).

Almost surely, 2^{6749837093721} is an apocalyptic number.

It is an amenable number.

6749837093721 is a deficient number, since it is larger than the sum of its proper divisors (2249945697911).

6749837093721 is a wasteful number, since it uses less digits than its factorization.

6749837093721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2249945697910.

The product of its (nonzero) digits is 96018048, while the sum is 66.

The spelling of 6749837093721 in words is "six trillion, seven hundred forty-nine billion, eight hundred thirty-seven million, ninety-three thousand, seven hundred twenty-one".