7481334748721 has 16 divisors (see below), whose sum is σ = 8137149795840. Its totient is φ = 6852177192960.

The previous prime is 7481334748709. The next prime is 7481334748813. The reversal of 7481334748721 is 1278474331847.

It is a cyclic number.

It is not a de Polignac number, because 7481334748721 - 2¹⁰ = 7481334747697 is a prime.

It is a super-2 number, since 2×7481334748721² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7481334748621) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5672720 + ... + 6866033.

It is an arithmetic number, because the mean of its divisors is an integer number (508571862240).

Almost surely, 2^{7481334748721} is an apocalyptic number.

It is an amenable number.

7481334748721 is a deficient number, since it is larger than the sum of its proper divisors (655815047119).

7481334748721 is a wasteful number, since it uses less digits than its factorization.

7481334748721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12539816.

The product of its digits is 25288704, while the sum is 59.

The spelling of 7481334748721 in words is "seven trillion, four hundred eighty-one billion, three hundred thirty-four million, seven hundred forty-eight thousand, seven hundred twenty-one".