491490146777 has 32 divisors (see below), whose sum is σ = 575675596800. Its totient is φ = 410944248000.

The previous prime is 491490146687. The next prime is 491490146803. The reversal of 491490146777 is 777641094194.

It is a cyclic number.

It is not a de Polignac number, because 491490146777 - 2¹⁰ = 491490145753 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (491490140777) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 26744402 + ... + 26762772.

It is an arithmetic number, because the mean of its divisors is an integer number (17989862400).

Almost surely, 2^491490146777 is an apocalyptic number.

It is an amenable number.

491490146777 is a deficient number, since it is larger than the sum of its proper divisors (84185450023).

491490146777 is a wasteful number, since it uses less digits than its factorization.

491490146777 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19037.

The product of its (nonzero) digits is 10668672, while the sum is 59.

The spelling of 491490146777 in words is "four hundred ninety-one billion, four hundred ninety million, one hundred forty-six thousand, seven hundred seventy-seven".