645622163701 has 8 divisors (see below), whose sum is σ = 679609651680. Its totient is φ = 611635413168.

The previous prime is 645622163657. The next prime is 645622163723. The reversal of 645622163701 is 107361226546.

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

It is a cyclic number.

It is not a de Polignac number, because 645622163701 - 2²¹ = 645620066549 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (645622163761) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3364590 + ... + 3551296.

It is an arithmetic number, because the mean of its divisors is an integer number (84951206460).

Almost surely, 2^645622163701 is an apocalyptic number.

It is an amenable number.

645622163701 is a deficient number, since it is larger than the sum of its proper divisors (33987487979).

645622163701 is a wasteful number, since it uses less digits than its factorization.

645622163701 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 368723.

The product of its (nonzero) digits is 362880, while the sum is 43.

The spelling of 645622163701 in words is "six hundred forty-five billion, six hundred twenty-two million, one hundred sixty-three thousand, seven hundred one".