8145686481 has 4 divisors (see below), whose sum is σ = 10860915312. Its totient is φ = 5430457652.

The previous prime is 8145686429. The next prime is 8145686491. The reversal of 8145686481 is 1846865418.

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 a cyclic number.

It is not a de Polignac number, because 8145686481 - 2⁹ = 8145685969 is a prime.

It is a super-2 number, since 2×8145686481² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (8145686411) 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, 1357614411 + ... + 1357614416.

It is an arithmetic number, because the mean of its divisors is an integer number (2715228828).

Almost surely, 2^8145686481 is an apocalyptic number.

It is an amenable number.

8145686481 is a deficient number, since it is larger than the sum of its proper divisors (2715228831).

8145686481 is a wasteful number, since it uses less digits than its factorization.

8145686481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2715228830.

The product of its digits is 1474560, while the sum is 51.

The square root of 8145686481 is about 90253.4568922432. The cubic root of 8145686481 is about 2012.0675803885.

The spelling of 8145686481 in words is "eight billion, one hundred forty-five million, six hundred eighty-six thousand, four hundred eighty-one".