64746189072 has 30 divisors (see below), whose sum is σ = 181199404542. Its totient is φ = 21582062976.

The previous prime is 64746189071. The next prime is 64746189091. The reversal of 64746189072 is 27098164746.

64746189072 is a `hidden beast` number, since 6 + 474 + 6 + 18 + 90 + 72 = 666.

It can be written as a sum of positive squares in only one way, i.e., 57214726416 + 7531462656 = 239196^2 + 86784^2 .

It is not an unprimeable number, because it can be changed into a prime (64746189071) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 224813013 + ... + 224813300.

Almost surely, 2^64746189072 is an apocalyptic number.

It is an amenable number.

64746189072 is an abundant number, since it is smaller than the sum of its proper divisors (116453215470).

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

64746189072 is a wasteful number, since it uses less digits than its factorization.

64746189072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 449626327 (or 449626318 counting only the distinct ones).

The product of its (nonzero) digits is 4064256, while the sum is 54.

The spelling of 64746189072 in words is "sixty-four billion, seven hundred forty-six million, one hundred eighty-nine thousand, seventy-two".