464640406644 has 12 divisors (see below), whose sum is σ = 1084160948864. Its totient is φ = 154880135544.

The previous prime is 464640406639. The next prime is 464640406651. The reversal of 464640406644 is 446604046464.

It is a tau number, because it is divible by the number of its divisors (12).

It is a junction number, because it is equal to n+sod(n) for n = 464640406593 and 464640406602.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19360016932 + ... + 19360016955.

Almost surely, 2^464640406644 is an apocalyptic number.

It is an amenable number.

464640406644 is an abundant number, since it is smaller than the sum of its proper divisors (619520542220).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

464640406644 is a wasteful number, since it uses less digits than its factorization.

464640406644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38720033894 (or 38720033892 counting only the distinct ones).

The product of its (nonzero) digits is 5308416, while the sum is 48.

The spelling of 464640406644 in words is "four hundred sixty-four billion, six hundred forty million, four hundred six thousand, six hundred forty-four".