64647458028 has 36 divisors (see below), whose sum is σ = 164134315800. Its totient is φ = 21454219776.

The previous prime is 64647458021. The next prime is 64647458053. The reversal of 64647458028 is 82085474646.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (36).

It is a hoax number, since the sum of its digits (54) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (64647458021) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3947253 + ... + 3963596.

It is an arithmetic number, because the mean of its divisors is an integer number (4559286550).

Almost surely, 2^64647458028 is an apocalyptic number.

It is an amenable number.

64647458028 is an abundant number, since it is smaller than the sum of its proper divisors (99486857772).

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

64647458028 is a wasteful number, since it uses less digits than its factorization.

64647458028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7911086 (or 7911081 counting only the distinct ones).

The product of its (nonzero) digits is 10321920, while the sum is 54.

The spelling of 64647458028 in words is "sixty-four billion, six hundred forty-seven million, four hundred fifty-eight thousand, twenty-eight".