64876948521 has 32 divisors (see below), whose sum is σ = 111326355456. Its totient is φ = 32615136000.

The previous prime is 64876948511. The next prime is 64876948531. The reversal of 64876948521 is 12584967846.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (64876948511) and next prime (64876948531).

It is not a de Polignac number, because 64876948521 - 2⁵ = 64876948489 is a prime.

It is not an unprimeable number, because it can be changed into a prime (64876948501) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4522720 + ... + 4537041.

It is an arithmetic number, because the mean of its divisors is an integer number (3478948608).

Almost surely, 2^64876948521 is an apocalyptic number.

It is an amenable number.

64876948521 is a deficient number, since it is larger than the sum of its proper divisors (46449406935).

64876948521 is a wasteful number, since it uses less digits than its factorization.

64876948521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9059813.

The product of its digits is 23224320, while the sum is 60.

The spelling of 64876948521 in words is "sixty-four billion, eight hundred seventy-six million, nine hundred forty-eight thousand, five hundred twenty-one".