6420146564 has 24 divisors (see below), whose sum is σ = 12105773400. Its totient is φ = 2961609984.

The previous prime is 6420146539. The next prime is 6420146567. The reversal of 6420146564 is 4656410246.

It can be written as a sum of positive squares in 4 ways, for example, as 860952964 + 5559193600 = 29342^2 + 74560^2 .

It is not an unprimeable number, because it can be changed into a prime (6420146567) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 72662 + ... + 134610.

It is an arithmetic number, because the mean of its divisors is an integer number (504407225).

Almost surely, 2^6420146564 is an apocalyptic number.

It is an amenable number.

6420146564 is a deficient number, since it is larger than the sum of its proper divisors (5685626836).

6420146564 is a wasteful number, since it uses less digits than its factorization.

6420146564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63959 (or 63957 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 38.

The square root of 6420146564 is about 80125.8170878775. The cubic root of 6420146564 is about 1858.5816608515.

The spelling of 6420146564 in words is "six billion, four hundred twenty million, one hundred forty-six thousand, five hundred sixty-four".