64500012 has 36 divisors (see below), whose sum is σ = 163459296. Its totient is φ = 21444960.

The previous prime is 64500001. The next prime is 64500049. The reversal of 64500012 is 21000546.

It is a happy number.

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

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 13438 + ... + 17594.

It is an arithmetic number, because the mean of its divisors is an integer number (4540536).

Almost surely, 2^64500012 is an apocalyptic number.

It is an amenable number.

64500012 is an abundant number, since it is smaller than the sum of its proper divisors (98959284).

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

64500012 is a wasteful number, since it uses less digits than its factorization.

64500012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4598 (or 4593 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 64500012 is about 8031.1899491918. The cubic root of 64500012 is about 401.0389905765.

Adding to 64500012 its reverse (21000546), we get a palindrome (85500558).

It can be divided in two parts, 6 and 4500012, that multiplied together give a palindrome (27000072).

The spelling of 64500012 in words is "sixty-four million, five hundred thousand, twelve".