491736345 has 16 divisors (see below), whose sum is σ = 787300800. Its totient is φ = 262085184.

The previous prime is 491736331. The next prime is 491736361. The reversal of 491736345 is 543637194.

It is not a de Polignac number, because 491736345 - 2⁵ = 491736313 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 491736297 and 491736306.

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, 14331 + ... + 34479.

It is an arithmetic number, because the mean of its divisors is an integer number (49206300).

Almost surely, 2^491736345 is an apocalyptic number.

It is an amenable number.

491736345 is a deficient number, since it is larger than the sum of its proper divisors (295564455).

491736345 is a wasteful number, since it uses less digits than its factorization.

491736345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21784.

The product of its digits is 272160, while the sum is 42.

The square root of 491736345 is about 22175.1289736948. The cubic root of 491736345 is about 789.3036351374.

The spelling of 491736345 in words is "four hundred ninety-one million, seven hundred thirty-six thousand, three hundred forty-five".