491825651943 has 8 divisors (see below), whose sum is σ = 656002001008. Its totient is φ = 327766535424.

The previous prime is 491825651923. The next prime is 491825651953. The reversal of 491825651943 is 349156528194.

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

It is a de Polignac number, because none of the positive numbers 2^k-491825651943 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (491825651903) 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, 29298346 + ... + 29315127.

It is an arithmetic number, because the mean of its divisors is an integer number (82000250126).

Almost surely, 2^491825651943 is an apocalyptic number.

491825651943 is a deficient number, since it is larger than the sum of its proper divisors (164176349065).

491825651943 is a wasteful number, since it uses less digits than its factorization.

491825651943 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58616273.

The product of its digits is 9331200, while the sum is 57.

The spelling of 491825651943 in words is "four hundred ninety-one billion, eight hundred twenty-five million, six hundred fifty-one thousand, nine hundred forty-three".