64642404226422 has 64 divisors (see below), whose sum is σ = 142445711835648. Its totient is φ = 19393118880000.

The previous prime is 64642404226417. The next prime is 64642404226447. The reversal of 64642404226422 is 22462240424646.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 84885738 + ... + 85643874.

It is an arithmetic number, because the mean of its divisors is an integer number (2225714247432).

Almost surely, 2^{64642404226422} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 64642404226422, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (71222855917824).

64642404226422 is an abundant number, since it is smaller than the sum of its proper divisors (77803307609226).

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

64642404226422 is a wasteful number, since it uses less digits than its factorization.

64642404226422 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 771045.

The product of its (nonzero) digits is 7077888, while the sum is 48.

The spelling of 64642404226422 in words is "sixty-four trillion, six hundred forty-two billion, four hundred four million, two hundred twenty-six thousand, four hundred twenty-two".