8491018491 has 48 divisors (see below), whose sum is σ = 12960020736. Its totient is φ = 5346399168.

The previous prime is 8491018447. The next prime is 8491018493. The reversal of 8491018491 is 1948101948.

It is not a de Polignac number, because 8491018491 - 2⁶ = 8491018427 is a prime.

It is not an unprimeable number, because it can be changed into a prime (8491018493) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 11583561 + ... + 11584293.

It is an arithmetic number, because the mean of its divisors is an integer number (270000432).

Almost surely, 2^8491018491 is an apocalyptic number.

8491018491 is a deficient number, since it is larger than the sum of its proper divisors (4469002245).

8491018491 is a wasteful number, since it uses less digits than its factorization.

8491018491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1392 (or 1389 counting only the distinct ones).

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

The square root of 8491018491 is about 92146.7226275574. The cubic root of 8491018491 is about 2040.1084854360.

The spelling of 8491018491 in words is "eight billion, four hundred ninety-one million, eighteen thousand, four hundred ninety-one".