491800591415 has 16 divisors (see below), whose sum is σ = 674543718912. Its totient is φ = 337197523104.

The previous prime is 491800591357. The next prime is 491800591439. The reversal of 491800591415 is 514195008194.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-491800591415 is a prime.

It is a super-2 number, since 2×491800591415² (a number of 24 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 491800591415.

It is a congruent number.

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, 450329 + ... + 1089218.

It is an arithmetic number, because the mean of its divisors is an integer number (42158982432).

Almost surely, 2^491800591415 is an apocalyptic number.

491800591415 is a deficient number, since it is larger than the sum of its proper divisors (182743127497).

491800591415 is a wasteful number, since it uses less digits than its factorization.

491800591415 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1548686.

The product of its (nonzero) digits is 259200, while the sum is 47.

The spelling of 491800591415 in words is "four hundred ninety-one billion, eight hundred million, five hundred ninety-one thousand, four hundred fifteen".