64949803212 has 72 divisors (see below), whose sum is σ = 176798017200. Its totient is φ = 18503856000.

The previous prime is 64949803211. The next prime is 64949803213. The reversal of 64949803212 is 21230894946.

It is an interprime number because it is at equal distance from previous prime (64949803211) and next prime (64949803213).

It is a super-4 number, since 4×64949803212⁴ (a number of 44 digits) contains 4444 as substring.

It is not an unprimeable number, because it can be changed into a prime (64949803211) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 46962 + ... + 363462.

Almost surely, 2^64949803212 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 64949803212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (88399008600).

64949803212 is an abundant number, since it is smaller than the sum of its proper divisors (111848213988).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

64949803212 is a wasteful number, since it uses less digits than its factorization.

64949803212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 316871 (or 316862 counting only the distinct ones).

The product of its (nonzero) digits is 746496, while the sum is 48.

The spelling of 64949803212 in words is "sixty-four billion, nine hundred forty-nine million, eight hundred three thousand, two hundred twelve".