491807601 has 6 divisors (see below), whose sum is σ = 710388770. Its totient is φ = 327871728.

The previous prime is 491807599. The next prime is 491807623. The reversal of 491807601 is 106708194.

491807601 is a `hidden beast` number, since 49 + 1 + 8 + 0 + 7 + 601 = 666.

It can be written as a sum of positive squares in only one way, i.e., 368064225 + 123743376 = 19185^2 + 11124^2 .

It is not a de Polignac number, because 491807601 - 2¹ = 491807599 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (491807101) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 27322636 + ... + 27322653.

Almost surely, 2^491807601 is an apocalyptic number.

It is an amenable number.

491807601 is a deficient number, since it is larger than the sum of its proper divisors (218581169).

491807601 is a wasteful number, since it uses less digits than its factorization.

491807601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54645295 (or 54645292 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 36.

The square root of 491807601 is about 22176.7355803328. The cubic root of 491807601 is about 789.3417584827.

The spelling of 491807601 in words is "four hundred ninety-one million, eight hundred seven thousand, six hundred one".