219620397664 has 96 divisors (see below), whose sum is σ = 444097188864. Its totient is φ = 106871232000.

The previous prime is 219620397641. The next prime is 219620397671. The reversal of 219620397664 is 466793026912.

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, 120471057 + ... + 120472879.

It is an arithmetic number, because the mean of its divisors is an integer number (4626012384).

Almost surely, 2^219620397664 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 219620397664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (222048594432).

219620397664 is an abundant number, since it is smaller than the sum of its proper divisors (224476791200).

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

219620397664 is a wasteful number, since it uses less digits than its factorization.

219620397664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2420 (or 2412 counting only the distinct ones).

The product of its (nonzero) digits is 5878656, while the sum is 55.

The spelling of 219620397664 in words is "two hundred nineteen billion, six hundred twenty million, three hundred ninety-seven thousand, six hundred sixty-four".