64333996851 has 32 divisors (see below), whose sum is σ = 88999837696. Its totient is φ = 41293476000.

The previous prime is 64333996843. The next prime is 64333996921. The reversal of 64333996851 is 15869933346.

It is a happy number.

It is not a de Polignac number, because 64333996851 - 2³ = 64333996843 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 64333996791 and 64333996800.

It is not an unprimeable number, because it can be changed into a prime (64333996451) 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, 18013896 + ... + 18017466.

It is an arithmetic number, because the mean of its divisors is an integer number (2781244928).

Almost surely, 2^64333996851 is an apocalyptic number.

64333996851 is a deficient number, since it is larger than the sum of its proper divisors (24665840845).

64333996851 is a wasteful number, since it uses less digits than its factorization.

64333996851 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4543.

The product of its digits is 12597120, while the sum is 57.

The spelling of 64333996851 in words is "sixty-four billion, three hundred thirty-three million, nine hundred ninety-six thousand, eight hundred fifty-one".