64191009855436 has 48 divisors (see below), whose sum is σ = 113073466578688. Its totient is φ = 31884934348800.

The previous prime is 64191009855419. The next prime is 64191009855443. The reversal of 64191009855436 is 63455890019146.

It is a happy number.

64191009855436 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 2409468676 + ... + 2409495316.

Almost surely, 2^{64191009855436} is an apocalyptic number.

It is an amenable number.

64191009855436 is a deficient number, since it is larger than the sum of its proper divisors (48882456723252).

64191009855436 is a wasteful number, since it uses less digits than its factorization.

64191009855436 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32402 (or 32400 counting only the distinct ones).

The product of its (nonzero) digits is 27993600, while the sum is 61.

The spelling of 64191009855436 in words is "sixty-four trillion, one hundred ninety-one billion, nine million, eight hundred fifty-five thousand, four hundred thirty-six".