491683737601 has 16 divisors (see below), whose sum is σ = 572386122880. Its totient is φ = 413627057280.

The previous prime is 491683737581. The next prime is 491683737613. The reversal of 491683737601 is 106737386194.

It is a cyclic number.

It is not a de Polignac number, because 491683737601 - 2⁹ = 491683737089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (491683735601) 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, 1064691 + ... + 1454968.

It is an arithmetic number, because the mean of its divisors is an integer number (35774132680).

Almost surely, 2^491683737601 is an apocalyptic number.

It is an amenable number.

491683737601 is a deficient number, since it is larger than the sum of its proper divisors (80702385279).

491683737601 is a wasteful number, since it uses less digits than its factorization.

491683737601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2520184.

The product of its (nonzero) digits is 4572288, while the sum is 55.

The spelling of 491683737601 in words is "four hundred ninety-one billion, six hundred eighty-three million, seven hundred thirty-seven thousand, six hundred one".