8454421491 has 8 divisors (see below), whose sum is σ = 11334842064. Its totient is φ = 5605140960.

The previous prime is 8454421483. The next prime is 8454421501. The reversal of 8454421491 is 1941244548.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 8454421491 - 2³ = 8454421483 is a prime.

It is not an unprimeable number, because it can be changed into a prime (8454421421) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7784376 + ... + 7785461.

It is an arithmetic number, because the mean of its divisors is an integer number (1416855258).

Almost surely, 2^8454421491 is an apocalyptic number.

8454421491 is a deficient number, since it is larger than the sum of its proper divisors (2880420573).

8454421491 is a wasteful number, since it uses less digits than its factorization.

8454421491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15570021.

The product of its digits is 184320, while the sum is 42.

The square root of 8454421491 is about 91947.9281495782. The cubic root of 8454421491 is about 2037.1732516090.

The spelling of 8454421491 in words is "eight billion, four hundred fifty-four million, four hundred twenty-one thousand, four hundred ninety-one".