491247341545 has 16 divisors (see below), whose sum is σ = 601413057360. Its totient is φ = 385073305344.

The previous prime is 491247341513. The next prime is 491247341573. The reversal of 491247341545 is 545143742194.

It can be written as a sum of positive squares in 8 ways, for example, as 38070643689 + 453176697856 = 195117^2 + 673184^2 .

It is a cyclic number.

It is not a de Polignac number, because 491247341545 - 2⁵ = 491247341513 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1023810 + ... + 1425019.

It is an arithmetic number, because the mean of its divisors is an integer number (37588316085).

Almost surely, 2^491247341545 is an apocalyptic number.

It is an amenable number.

491247341545 is a deficient number, since it is larger than the sum of its proper divisors (110165715815).

491247341545 is a wasteful number, since it uses less digits than its factorization.

491247341545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2449644.

The product of its digits is 2419200, while the sum is 49.

The spelling of 491247341545 in words is "four hundred ninety-one billion, two hundred forty-seven million, three hundred forty-one thousand, five hundred forty-five".