7392748919521 has 21 divisors (see below), whose sum is σ = 8625951440049. Its totient is φ = 6335842556484.

The previous prime is 7392748919519. The next prime is 7392748919527. The reversal of 7392748919521 is 1259198472937.

The square root of 7392748919521 is 2718961.

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

It is not a de Polignac number, because 7392748919521 - 2¹ = 7392748919519 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7392748919527) by changing a digit.

It is a polite number, since it can be written in 20 ways as a sum of consecutive naturals, for example, 932599660 + ... + 932607586.

Almost surely, 2^{7392748919521} is an apocalyptic number.

7392748919521 is the 2718961-st square number.

7392748919521 is the 1359481-st centered octagonal number.

It is an amenable number.

7392748919521 is a deficient number, since it is larger than the sum of its proper divisors (1233202520528).

7392748919521 is an frugal number, since it uses more digits than its factorization.

7392748919521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15896 (or 7934 counting only the distinct ones).

The product of its digits is 68584320, while the sum is 67.

The spelling of 7392748919521 in words is "seven trillion, three hundred ninety-two billion, seven hundred forty-eight million, nine hundred nineteen thousand, five hundred twenty-one".