64311729066 has 48 divisors (see below), whose sum is σ = 150125025960. Its totient is φ = 19779742080.

The previous prime is 64311729029. The next prime is 64311729121. The reversal of 64311729066 is 66092711346.

64311729066 is a `hidden beast` number, since 6 + 431 + 1 + 72 + 90 + 66 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 12131921025 + 52179808041 = 110145^2 + 228429^2 .

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 499440 + ... + 614868.

Almost surely, 2^64311729066 is an apocalyptic number.

64311729066 is an abundant number, since it is smaller than the sum of its proper divisors (85813296894).

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

64311729066 is a wasteful number, since it uses less digits than its factorization.

64311729066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 117831 (or 117828 counting only the distinct ones).

The product of its (nonzero) digits is 326592, while the sum is 45.

The spelling of 64311729066 in words is "sixty-four billion, three hundred eleven million, seven hundred twenty-nine thousand, sixty-six".