6420164450 has 96 divisors (see below), whose sum is σ = 14175473664. Its totient is φ = 2117586240.

The previous prime is 6420164441. The next prime is 6420164477. The reversal of 6420164450 is 544610246.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1005167 + ... + 1011533.

It is an arithmetic number, because the mean of its divisors is an integer number (147661184).

Almost surely, 2^6420164450 is an apocalyptic number.

6420164450 is an abundant number, since it is smaller than the sum of its proper divisors (7755309214).

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

6420164450 is a wasteful number, since it uses less digits than its factorization.

6420164450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6496 (or 6491 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 32.

The square root of 6420164450 is about 80125.9286997661. The cubic root of 6420164450 is about 1858.5833868018.

Adding to 6420164450 its reverse (544610246), we get a palindrome (6964774696).

The spelling of 6420164450 in words is "six billion, four hundred twenty million, one hundred sixty-four thousand, four hundred fifty".