1491716845 has 8 divisors (see below), whose sum is σ = 1797193440. Its totient is φ = 1188618000.

The previous prime is 1491716843. The next prime is 1491716851. The reversal of 1491716845 is 5486171941.

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

It is not a de Polignac number, because 1491716845 - 2¹ = 1491716843 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1491716795 and 1491716804.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1491716843) 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, 593055 + ... + 595564.

It is an arithmetic number, because the mean of its divisors is an integer number (224649180).

Almost surely, 2^1491716845 is an apocalyptic number.

It is an amenable number.

1491716845 is a deficient number, since it is larger than the sum of its proper divisors (305476595).

1491716845 is a wasteful number, since it uses less digits than its factorization.

1491716845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1188875.

The product of its digits is 241920, while the sum is 46.

The square root of 1491716845 is about 38622.7503551987. The cubic root of 1491716845 is about 1142.6032753340.

The spelling of 1491716845 in words is "one billion, four hundred ninety-one million, seven hundred sixteen thousand, eight hundred forty-five".