8464744581 has 4 divisors (see below), whose sum is σ = 11286326112. Its totient is φ = 5643163052.

The previous prime is 8464744553. The next prime is 8464744621. The reversal of 8464744581 is 1854474648.

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 8464744581 - 2¹⁴ = 8464728197 is a prime.

It is a super-2 number, since 2×8464744581² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8464744501) 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, 1410790761 + ... + 1410790766.

It is an arithmetic number, because the mean of its divisors is an integer number (2821581528).

Almost surely, 2^8464744581 is an apocalyptic number.

It is an amenable number.

8464744581 is a deficient number, since it is larger than the sum of its proper divisors (2821581531).

8464744581 is a wasteful number, since it uses less digits than its factorization.

8464744581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2821581530.

The product of its digits is 3440640, while the sum is 51.

The square root of 8464744581 is about 92004.0465468775. The cubic root of 8464744581 is about 2038.0020632656.

The spelling of 8464744581 in words is "eight billion, four hundred sixty-four million, seven hundred forty-four thousand, five hundred eighty-one".