64223622642 has 32 divisors (see below), whose sum is σ = 128886811200. Its totient is φ = 21334681088.

The previous prime is 64223622613. The next prime is 64223622647. The reversal of 64223622642 is 24622632246.

It is a self number, because there is not a number n which added to its sum of digits gives 64223622642.

It is not an unprimeable number, because it can be changed into a prime (64223622647) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4425334 + ... + 4439822.

It is an arithmetic number, because the mean of its divisors is an integer number (4027712850).

Almost surely, 2^64223622642 is an apocalyptic number.

64223622642 is an abundant number, since it is smaller than the sum of its proper divisors (64663188558).

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

64223622642 is a wasteful number, since it uses less digits than its factorization.

64223622642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16970.

The product of its digits is 331776, while the sum is 39.

The spelling of 64223622642 in words is "sixty-four billion, two hundred twenty-three million, six hundred twenty-two thousand, six hundred forty-two".