464911781643 has 12 divisors (see below), whose sum is σ = 671593414440. Its totient is φ = 309916184256.

The previous prime is 464911781611. The next prime is 464911781683. The reversal of 464911781643 is 346187119464.

It is a happy number.

464911781643 is a `hidden beast` number, since 4 + 6 + 491 + 17 + 81 + 64 + 3 = 666.

It is not a de Polignac number, because 464911781643 - 2⁵ = 464911781611 is a prime.

It is a super-2 number, since 2×464911781643² (a number of 24 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 464911781643.

It is not an unprimeable number, because it can be changed into a prime (464911781683) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1965513 + ... + 2189306.

It is an arithmetic number, because the mean of its divisors is an integer number (55966117870).

Almost surely, 2^464911781643 is an apocalyptic number.

464911781643 is a deficient number, since it is larger than the sum of its proper divisors (206681632797).

464911781643 is a wasteful number, since it uses less digits than its factorization.

464911781643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4167258 (or 4167255 counting only the distinct ones).

The product of its digits is 3483648, while the sum is 54.

The spelling of 464911781643 in words is "four hundred sixty-four billion, nine hundred eleven million, seven hundred eighty-one thousand, six hundred forty-three".