64222116378 has 128 divisors (see below), whose sum is σ = 150865182720. Its totient is φ = 17848995840.

The previous prime is 64222116347. The next prime is 64222116389. The reversal of 64222116378 is 87361122246.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 123266758 + ... + 123267278.

It is an arithmetic number, because the mean of its divisors is an integer number (1178634240).

Almost surely, 2^64222116378 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 64222116378, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (75432591360).

64222116378 is an abundant number, since it is smaller than the sum of its proper divisors (86643066342).

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

64222116378 is a wasteful number, since it uses less digits than its factorization.

64222116378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1092.

The product of its digits is 193536, while the sum is 42.

The spelling of 64222116378 in words is "sixty-four billion, two hundred twenty-two million, one hundred sixteen thousand, three hundred seventy-eight".