64381393750 has 24 divisors (see below), whose sum is σ = 120707399232. Its totient is φ = 25752555000.

The previous prime is 64381393721. The next prime is 64381393757. The reversal of 64381393750 is 5739318346.

It is a super-2 number, since 2×64381393750² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 64381393694 and 64381393703.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64381393757) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5144262 + ... + 5156761.

It is an arithmetic number, because the mean of its divisors is an integer number (5029474968).

Almost surely, 2^64381393750 is an apocalyptic number.

64381393750 is a deficient number, since it is larger than the sum of its proper divisors (56326005482).

64381393750 is an equidigital number, since it uses as much as digits as its factorization.

64381393750 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10301050 (or 10301030 counting only the distinct ones).

The product of its (nonzero) digits is 1632960, while the sum is 49.

The spelling of 64381393750 in words is "sixty-four billion, three hundred eighty-one million, three hundred ninety-three thousand, seven hundred fifty".