64438956395 has 16 divisors (see below), whose sum is σ = 84361381632. Its totient is φ = 46861956960.

The previous prime is 64438956389. The next prime is 64438956409. The reversal of 64438956395 is 59365983446.

64438956395 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 64438956395 - 2¹² = 64438952299 is a prime.

It is a super-2 number, since 2×64438956395² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1836284 + ... + 1871046.

It is an arithmetic number, because the mean of its divisors is an integer number (5272586352).

Almost surely, 2^64438956395 is an apocalyptic number.

64438956395 is a deficient number, since it is larger than the sum of its proper divisors (19922425237).

64438956395 is a wasteful number, since it uses less digits than its factorization.

64438956395 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68482.

The product of its digits is 83980800, while the sum is 62.

The spelling of 64438956395 in words is "sixty-four billion, four hundred thirty-eight million, nine hundred fifty-six thousand, three hundred ninety-five".