64570000 has 100 divisors (see below), whose sum is σ = 170832816. Its totient is φ = 23440000.

The previous prime is 64569997. The next prime is 64570019. The reversal of 64570000 is 7546.

It is a tau number, because it is divible by the number of its divisors (100).

It is a Harshad number since it is a multiple of its sum of digits (22).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 109707 + ... + 110293.

Almost surely, 2^64570000 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 64570000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (85416408).

64570000 is an abundant number, since it is smaller than the sum of its proper divisors (106262816).

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

64570000 is a wasteful number, since it uses less digits than its factorization.

64570000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 626 (or 605 counting only the distinct ones).

The product of its (nonzero) digits is 840, while the sum is 22.

The square root of 64570000 is about 8035.5460299845. The cubic root of 64570000 is about 401.1839919498.

Adding to 64570000 its reverse (7546), we get a palindrome (64577546).

The spelling of 64570000 in words is "sixty-four million, five hundred seventy thousand".