645120422014 has 8 divisors (see below), whose sum is σ = 998896137408. Its totient is φ = 312155042880.

The previous prime is 645120421873. The next prime is 645120422027. The reversal of 645120422014 is 410224021546.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5202583987 + ... + 5202584110.

It is an arithmetic number, because the mean of its divisors is an integer number (124862017176).

Almost surely, 2^645120422014 is an apocalyptic number.

645120422014 is a deficient number, since it is larger than the sum of its proper divisors (353775715394).

645120422014 is a wasteful number, since it uses less digits than its factorization.

645120422014 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10405168130.

The product of its (nonzero) digits is 15360, while the sum is 31.

The spelling of 645120422014 in words is "six hundred forty-five billion, one hundred twenty million, four hundred twenty-two thousand, fourteen".