464640406643 has 4 divisors (see below), whose sum is σ = 531017607600. Its totient is φ = 398263205688.

The previous prime is 464640406639. The next prime is 464640406651. The reversal of 464640406643 is 346604046464.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 464640406643 - 2² = 464640406639 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (464640406613) 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 3 ways as a sum of consecutive naturals, for example, 33188600468 + ... + 33188600481.

It is an arithmetic number, because the mean of its divisors is an integer number (132754401900).

Almost surely, 2^464640406643 is an apocalyptic number.

464640406643 is a deficient number, since it is larger than the sum of its proper divisors (66377200957).

464640406643 is an equidigital number, since it uses as much as digits as its factorization.

464640406643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66377200956.

The product of its (nonzero) digits is 3981312, while the sum is 47.

The spelling of 464640406643 in words is "four hundred sixty-four billion, six hundred forty million, four hundred six thousand, six hundred forty-three".