64642602200440 has 64 divisors (see below), whose sum is σ = 159917561487360. Its totient is φ = 23321311009920.

The previous prime is 64642602200389. The next prime is 64642602200459. The reversal of 64642602200440 is 4400220624646.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a junction number, because it is equal to n+sod(n) for n = 64642602200393 and 64642602200402.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 578349652 + ... + 578461411.

It is an arithmetic number, because the mean of its divisors is an integer number (2498711898240).

Almost surely, 2^{64642602200440} is an apocalyptic number.

It is an amenable number.

64642602200440 is an abundant number, since it is smaller than the sum of its proper divisors (95274959286920).

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

64642602200440 is a wasteful number, since it uses less digits than its factorization.

64642602200440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1156811212 (or 1156811208 counting only the distinct ones).

The product of its (nonzero) digits is 442368, while the sum is 40.

The spelling of 64642602200440 in words is "sixty-four trillion, six hundred forty-two billion, six hundred two million, two hundred thousand, four hundred forty".