464641561 has 16 divisors (see below), whose sum is σ = 522829440. Its totient is φ = 410762880.

The previous prime is 464641559. The next prime is 464641571. The reversal of 464641561 is 165146464.

It is a cyclic number.

It is not a de Polignac number, because 464641561 - 2¹ = 464641559 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 464641561.

It is not an unprimeable number, because it can be changed into a prime (464641571) 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, 4951 + ... + 30883.

It is an arithmetic number, because the mean of its divisors is an integer number (32676840).

Almost surely, 2^464641561 is an apocalyptic number.

464641561 is a gapful number since it is divisible by the number (41) formed by its first and last digit.

It is an amenable number.

464641561 is a deficient number, since it is larger than the sum of its proper divisors (58187879).

464641561 is a wasteful number, since it uses less digits than its factorization.

464641561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26016.

The product of its digits is 69120, while the sum is 37.

The square root of 464641561 is about 21555.5459453014. The cubic root of 464641561 is about 774.5319746467.

The spelling of 464641561 in words is "four hundred sixty-four million, six hundred forty-one thousand, five hundred sixty-one".