464554491991 has 16 divisors (see below), whose sum is σ = 511851225600. Its totient is φ = 419821331328.

The previous prime is 464554491983. The next prime is 464554492057. The reversal of 464554491991 is 199194455464.

It is a cyclic number.

It is not a de Polignac number, because 464554491991 - 2³ = 464554491983 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 (464554491931) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5342511 + ... + 5428768.

It is an arithmetic number, because the mean of its divisors is an integer number (31990701600).

Almost surely, 2^464554491991 is an apocalyptic number.

464554491991 is a deficient number, since it is larger than the sum of its proper divisors (47296733609).

464554491991 is a wasteful number, since it uses less digits than its factorization.

464554491991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10771398.

The product of its digits is 27993600, while the sum is 61.

The spelling of 464554491991 in words is "four hundred sixty-four billion, five hundred fifty-four million, four hundred ninety-one thousand, nine hundred ninety-one".