8420450064 has 160 divisors (see below), whose sum is σ = 25333378560. Its totient is φ = 2386477056.

The previous prime is 8420450033. The next prime is 8420450069. The reversal of 8420450064 is 4600540248.

It is not an unprimeable number, because it can be changed into a prime (8420450069) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 490132 + ... + 507020.

It is an arithmetic number, because the mean of its divisors is an integer number (158333616).

Almost surely, 2^8420450064 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 8420450064, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12666689280).

8420450064 is an abundant number, since it is smaller than the sum of its proper divisors (16912928496).

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

8420450064 is a wasteful number, since it uses less digits than its factorization.

8420450064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16977 (or 16971 counting only the distinct ones).

The product of its (nonzero) digits is 30720, while the sum is 33.

The square root of 8420450064 is about 91763.0103255119. The cubic root of 8420450064 is about 2034.4410093263.

The spelling of 8420450064 in words is "eight billion, four hundred twenty million, four hundred fifty thousand, sixty-four".