64534331523403 has 24 divisors (see below), whose sum is σ = 76857925095600. Its totient is φ = 54028739409120.

The previous prime is 64534331523349. The next prime is 64534331523461. The reversal of 64534331523403 is 30432513343546.

It is not a de Polignac number, because 64534331523403 - 2³⁷ = 64396892569931 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64534331523203) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4386618 + ... + 12178303.

It is an arithmetic number, because the mean of its divisors is an integer number (3202413545650).

Almost surely, 2^{64534331523403} is an apocalyptic number.

64534331523403 is a deficient number, since it is larger than the sum of its proper divisors (12323593572197).

64534331523403 is an frugal number, since it uses more digits than its factorization.

64534331523403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16565064 (or 16564971 counting only the distinct ones).

The product of its (nonzero) digits is 4665600, while the sum is 46.

Adding to 64534331523403 its reverse (30432513343546), we get a palindrome (94966844866949).

The spelling of 64534331523403 in words is "sixty-four trillion, five hundred thirty-four billion, three hundred thirty-one million, five hundred twenty-three thousand, four hundred three".