64075784623840 has 72 divisors (see below), whose sum is σ = 166391838695880. Its totient is φ = 23300285310720.

The previous prime is 64075784623789. The next prime is 64075784623841. The reversal of 64075784623840 is 4832648757046.

It is a hoax number, since the sum of its digits (64) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64075784623841) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1654830450 + ... + 1654869169.

It is an arithmetic number, because the mean of its divisors is an integer number (2310997759665).

Almost surely, 2^{64075784623840} is an apocalyptic number.

It is an amenable number.

64075784623840 is an abundant number, since it is smaller than the sum of its proper divisors (102316054072040).

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

64075784623840 is a wasteful number, since it uses less digits than its factorization.

64075784623840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3309699656 (or 3309699637 counting only the distinct ones).

The product of its (nonzero) digits is 216760320, while the sum is 64.

The spelling of 64075784623840 in words is "sixty-four trillion, seventy-five billion, seven hundred eighty-four million, six hundred twenty-three thousand, eight hundred forty".