8461543731 has 16 divisors (see below), whose sum is σ = 11359504800. Its totient is φ = 5602341888.

The previous prime is 8461543703. The next prime is 8461543751. The reversal of 8461543731 is 1373451648.

It is a happy number.

It is not a de Polignac number, because 8461543731 - 2²² = 8457349427 is a prime.

It is a super-2 number, since 2×8461543731² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (8461543751) 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, 1489765 + ... + 1495433.

It is an arithmetic number, because the mean of its divisors is an integer number (709969050).

Almost surely, 2^8461543731 is an apocalyptic number.

8461543731 is a deficient number, since it is larger than the sum of its proper divisors (2897961069).

8461543731 is a wasteful number, since it uses less digits than its factorization.

8461543731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8998.

The product of its digits is 241920, while the sum is 42.

The square root of 8461543731 is about 91986.6497433187. The cubic root of 8461543731 is about 2037.7451481963.

The spelling of 8461543731 in words is "eight billion, four hundred sixty-one million, five hundred forty-three thousand, seven hundred thirty-one".