64784228642 has 16 divisors (see below), whose sum is σ = 111107293440. Its totient is φ = 27752515488.

The previous prime is 64784228627. The next prime is 64784228647. The reversal of 64784228642 is 24682248746.

It is a Smith number, since the sum of its digits (53) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (64784228647) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 979667 + ... + 1043702.

It is an arithmetic number, because the mean of its divisors is an integer number (6944205840).

Almost surely, 2^64784228642 is an apocalyptic number.

64784228642 is a deficient number, since it is larger than the sum of its proper divisors (46323064798).

64784228642 is a wasteful number, since it uses less digits than its factorization.

64784228642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2025665.

The product of its digits is 8257536, while the sum is 53.

The spelling of 64784228642 in words is "sixty-four billion, seven hundred eighty-four million, two hundred twenty-eight thousand, six hundred forty-two".