7993452381 has 16 divisors (see below), whose sum is σ = 11036088000. Its totient is φ = 5140247168.

The previous prime is 7993452367. The next prime is 7993452403. The reversal of 7993452381 is 1832543997.

It is a cyclic number.

It is not a de Polignac number, because 7993452381 - 2⁵ = 7993452349 is a prime.

It is a super-2 number, since 2×7993452381² (a number of 21 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7993452301) 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, 47470 + ... + 135056.

It is an arithmetic number, because the mean of its divisors is an integer number (689755500).

Almost surely, 2^7993452381 is an apocalyptic number.

It is an amenable number.

7993452381 is a deficient number, since it is larger than the sum of its proper divisors (3042635619).

7993452381 is a wasteful number, since it uses less digits than its factorization.

7993452381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88668.

The product of its digits is 1632960, while the sum is 51.

The square root of 7993452381 is about 89406.1093046778. The cubic root of 7993452381 is about 1999.4542161569.

The spelling of 7993452381 in words is "seven billion, nine hundred ninety-three million, four hundred fifty-two thousand, three hundred eighty-one".