491758239567436 has 12 divisors (see below), whose sum is σ = 860577388250328. Its totient is φ = 245878985781632.

The previous prime is 491758239567337. The next prime is 491758239567443. The reversal of 491758239567436 is 634765932857194.

It is a super-2 number, since 2×491758239567436² (a number of 30 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25004086 + ... + 40108861.

It is an arithmetic number, because the mean of its divisors is an integer number (71714782354194).

Almost surely, 2^{491758239567436} is an apocalyptic number.

It is an amenable number.

491758239567436 is a deficient number, since it is larger than the sum of its proper divisors (368819148682892).

491758239567436 is a wasteful number, since it uses less digits than its factorization.

491758239567436 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67001048 (or 67001046 counting only the distinct ones).

The product of its digits is 8230118400, while the sum is 79.

The spelling of 491758239567436 in words is "four hundred ninety-one trillion, seven hundred fifty-eight billion, two hundred thirty-nine million, five hundred sixty-seven thousand, four hundred thirty-six".