464650645561 has 4 divisors (see below), whose sum is σ = 464896624500. Its totient is φ = 464404666624.

The previous prime is 464650645549. The next prime is 464650645637. The reversal of 464650645561 is 165546056464.

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

It can be written as a sum of positive squares in 2 ways, for example, as 185067738025 + 279582907536 = 430195^2 + 528756^2 .

It is a cyclic number.

It is not a de Polignac number, because 464650645561 - 2²⁷ = 464516427833 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 464650645499 and 464650645508.

It is not an unprimeable number, because it can be changed into a prime (464650645961) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 122986636 + ... + 122990413.

It is an arithmetic number, because the mean of its divisors is an integer number (116224156125).

Almost surely, 2^464650645561 is an apocalyptic number.

It is an amenable number.

464650645561 is a deficient number, since it is larger than the sum of its proper divisors (245978939).

464650645561 is a wasteful number, since it uses less digits than its factorization.

464650645561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 245978938.

The product of its (nonzero) digits is 10368000, while the sum is 52.

The spelling of 464650645561 in words is "four hundred sixty-four billion, six hundred fifty million, six hundred forty-five thousand, five hundred sixty-one".