481149891 has 24 divisors (see below), whose sum is σ = 702846144. Its totient is φ = 317162880.

The previous prime is 481149869. The next prime is 481149917. The reversal of 481149891 is 198941184.

It is not a de Polignac number, because 481149891 - 2¹⁵ = 481117123 is a prime.

It is not an unprimeable number, because it can be changed into a prime (481149491) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 390246 + ... + 391476.

It is an arithmetic number, because the mean of its divisors is an integer number (29285256).

Almost surely, 2^481149891 is an apocalyptic number.

481149891 is a deficient number, since it is larger than the sum of its proper divisors (221696253).

481149891 is a wasteful number, since it uses less digits than its factorization.

481149891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1691 (or 1688 counting only the distinct ones).

The product of its digits is 82944, while the sum is 45.

The square root of 481149891 is about 21935.1291539393. The cubic root of 481149891 is about 783.5982617198.

The spelling of 481149891 in words is "four hundred eighty-one million, one hundred forty-nine thousand, eight hundred ninety-one".