64396987203 has 4 divisors (see below), whose sum is σ = 85862649608. Its totient is φ = 42931324800.

The previous prime is 64396987169. The next prime is 64396987217. The reversal of 64396987203 is 30278969346.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 64396987203 - 2¹⁰ = 64396986179 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64396987903) 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, 10732831198 + ... + 10732831203.

It is an arithmetic number, because the mean of its divisors is an integer number (21465662402).

Almost surely, 2^64396987203 is an apocalyptic number.

64396987203 is a deficient number, since it is larger than the sum of its proper divisors (21465662405).

64396987203 is a wasteful number, since it uses less digits than its factorization.

64396987203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21465662404.

The product of its (nonzero) digits is 11757312, while the sum is 57.

The spelling of 64396987203 in words is "sixty-four billion, three hundred ninety-six million, nine hundred eighty-seven thousand, two hundred three".