64203118969 has 54 divisors (see below), whose sum is σ = 76287415470. Its totient is φ = 53980945920.

The previous prime is 64203118961. The next prime is 64203118979. The reversal of 64203118969 is 96981130246.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 41376441744 + 22826677225 = 203412^2 + 151085^2 .

It is not a de Polignac number, because 64203118969 - 2³ = 64203118961 is a prime.

It is a super-2 number, since 2×64203118969² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64203118961) 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 53 ways as a sum of consecutive naturals, for example, 156975637 + ... + 156976045.

Almost surely, 2^64203118969 is an apocalyptic number.

It is an amenable number.

64203118969 is a deficient number, since it is larger than the sum of its proper divisors (12084296501).

64203118969 is a wasteful number, since it uses less digits than its factorization.

64203118969 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 599 (or 504 counting only the distinct ones).

The product of its (nonzero) digits is 559872, while the sum is 49.

The spelling of 64203118969 in words is "sixty-four billion, two hundred three million, one hundred eighteen thousand, nine hundred sixty-nine".