491651683199 has 16 divisors (see below), whose sum is σ = 529211931840. Its totient is φ = 455054415360.

The previous prime is 491651683189. The next prime is 491651683223. The reversal of 491651683199 is 991386156194.

It is a cyclic number.

It is not a de Polignac number, because 491651683199 - 2⁸ = 491651682943 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (491651683109) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5460782 + ... + 5550084.

It is an arithmetic number, because the mean of its divisors is an integer number (33075745740).

Almost surely, 2^491651683199 is an apocalyptic number.

491651683199 is a deficient number, since it is larger than the sum of its proper divisors (37560248641).

491651683199 is a wasteful number, since it uses less digits than its factorization.

491651683199 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94690.

The product of its digits is 12597120, while the sum is 62.

The spelling of 491651683199 in words is "four hundred ninety-one billion, six hundred fifty-one million, six hundred eighty-three thousand, one hundred ninety-nine".