64896915121603 has 4 divisors (see below), whose sum is σ = 64907428154688. Its totient is φ = 64886402088520.

The previous prime is 64896915121573. The next prime is 64896915121637. The reversal of 64896915121603 is 30612151969846.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-64896915121603 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64896915122603) 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, 5256507283 + ... + 5256519628.

It is an arithmetic number, because the mean of its divisors is an integer number (16226857038672).

Almost surely, 2^{64896915121603} is an apocalyptic number.

64896915121603 is a deficient number, since it is larger than the sum of its proper divisors (10513033085).

64896915121603 is a wasteful number, since it uses less digits than its factorization.

64896915121603 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10513033084.

The product of its (nonzero) digits is 16796160, while the sum is 61.

The spelling of 64896915121603 in words is "sixty-four trillion, eight hundred ninety-six billion, nine hundred fifteen million, one hundred twenty-one thousand, six hundred three".