8193725481 has 4 divisors (see below), whose sum is σ = 10924967312. Its totient is φ = 5462483652.

The previous prime is 8193725447. The next prime is 8193725497. The reversal of 8193725481 is 1845273918.

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 8193725481 - 2⁹ = 8193724969 is a prime.

It is a super-2 number, since 2×8193725481² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 8193725481.

It is not an unprimeable number, because it can be changed into a prime (8193725431) 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, 1365620911 + ... + 1365620916.

It is an arithmetic number, because the mean of its divisors is an integer number (2731241828).

Almost surely, 2^8193725481 is an apocalyptic number.

It is an amenable number.

8193725481 is a deficient number, since it is larger than the sum of its proper divisors (2731241831).

8193725481 is a wasteful number, since it uses less digits than its factorization.

8193725481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2731241830.

The product of its digits is 483840, while the sum is 48.

The square root of 8193725481 is about 90519.1995159038. The cubic root of 8193725481 is about 2016.0152043902.

The spelling of 8193725481 in words is "eight billion, one hundred ninety-three million, seven hundred twenty-five thousand, four hundred eighty-one".