64194871804352 has 28 divisors (see below), whose sum is σ = 127386958271040. Its totient is φ = 32097370507776.

The previous prime is 64194871804351. The next prime is 64194871804387. The reversal of 64194871804352 is 25340817849146.

It is a super-2 number, since 2×64194871804352² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64194871804351) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 51822353 + ... + 53046639.

It is a 1-persistent number, because it is pandigital, but 2⋅64194871804352 = 128389743608704 is not.

Almost surely, 2^{64194871804352} is an apocalyptic number.

It is an amenable number.

64194871804352 is a deficient number, since it is larger than the sum of its proper divisors (63192086466688).

64194871804352 is a wasteful number, since it uses less digits than its factorization.

64194871804352 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2043588 (or 2043578 counting only the distinct ones).

The product of its (nonzero) digits is 46448640, while the sum is 62.

The spelling of 64194871804352 in words is "sixty-four trillion, one hundred ninety-four billion, eight hundred seventy-one million, eight hundred four thousand, three hundred fifty-two".