64228069638 has 64 divisors (see below), whose sum is σ = 151641432000. Its totient is φ = 20112406272.

The previous prime is 64228069589. The next prime is 64228069651. The reversal of 64228069638 is 83696082246.

It is a Harshad number since it is a multiple of its sum of digits (54).

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, 496303 + ... + 612186.

It is an arithmetic number, because the mean of its divisors is an integer number (2369397375).

Almost surely, 2^64228069638 is an apocalyptic number.

64228069638 is an abundant number, since it is smaller than the sum of its proper divisors (87413362362).

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

64228069638 is a wasteful number, since it uses less digits than its factorization.

64228069638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1108566 (or 1108560 counting only the distinct ones).

The product of its (nonzero) digits is 5971968, while the sum is 54.

The spelling of 64228069638 in words is "sixty-four billion, two hundred twenty-eight million, sixty-nine thousand, six hundred thirty-eight".