64664326016072 has 32 divisors (see below), whose sum is σ = 121291480857600. Its totient is φ = 32319933475200.

The previous prime is 64664326016071. The next prime is 64664326016099. The reversal of 64664326016072 is 27061062346646.

It is a super-2 number, since 2×64664326016072² (a number of 28 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (64664326016071) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 227845697 + ... + 228129327.

It is an arithmetic number, because the mean of its divisors is an integer number (3790358776800).

Almost surely, 2^{64664326016072} is an apocalyptic number.

It is an amenable number.

64664326016072 is a deficient number, since it is larger than the sum of its proper divisors (56627154841528).

64664326016072 is a wasteful number, since it uses less digits than its factorization.

64664326016072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 294317 (or 294313 counting only the distinct ones).

The product of its (nonzero) digits is 10450944, while the sum is 53.

The spelling of 64664326016072 in words is "sixty-four trillion, six hundred sixty-four billion, three hundred twenty-six million, sixteen thousand, seventy-two".