64420843888408 has 64 divisors (see below), whose sum is σ = 140656905000000. Its totient is φ = 27086541660672.

The previous prime is 64420843888403. The next prime is 64420843888441. The reversal of 64420843888408 is 80488834802446.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64420843888403) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 55068198 + ... + 56225866.

It is an arithmetic number, because the mean of its divisors is an integer number (2197764140625).

Almost surely, 2^{64420843888408} is an apocalyptic number.

It is an amenable number.

64420843888408 is an abundant number, since it is smaller than the sum of its proper divisors (76236061111592).

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

64420843888408 is a wasteful number, since it uses less digits than its factorization.

64420843888408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1176484 (or 1176480 counting only the distinct ones).

The product of its (nonzero) digits is 301989888, while the sum is 67.

The spelling of 64420843888408 in words is "sixty-four trillion, four hundred twenty billion, eight hundred forty-three million, eight hundred eighty-eight thousand, four hundred eight".