464661642081 has 64 divisors (see below), whose sum is σ = 802837575680. Its totient is φ = 232143459840.

The previous prime is 464661642061. The next prime is 464661642089. The reversal of 464661642081 is 180246166464.

It is a happy number.

It is not a de Polignac number, because 464661642081 - 2⁷ = 464661641953 is a prime.

It is a super-2 number, since 2×464661642081² (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 464661642081.

It is not an unprimeable number, because it can be changed into a prime (464661642089) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 32987466 + ... + 33001548.

It is an arithmetic number, because the mean of its divisors is an integer number (12544337120).

Almost surely, 2^464661642081 is an apocalyptic number.

It is an amenable number.

464661642081 is a deficient number, since it is larger than the sum of its proper divisors (338175933599).

464661642081 is a wasteful number, since it uses less digits than its factorization.

464661642081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20486.

The product of its (nonzero) digits is 1327104, while the sum is 48.

The spelling of 464661642081 in words is "four hundred sixty-four billion, six hundred sixty-one million, six hundred forty-two thousand, eighty-one".