6420254776 has 32 divisors (see below), whose sum is σ = 13527632160. Its totient is φ = 2834358912.

The previous prime is 6420254773. The next prime is 6420254791. The reversal of 6420254776 is 6774520246.

It is a super-3 number, since 3×6420254776³ (a number of 30 digits) contains 333 as substring.

It is a Smith number, since the sum of its digits (43) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6420254773) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1339635 + ... + 1344418.

It is an arithmetic number, because the mean of its divisors is an integer number (422738505).

Almost surely, 2^6420254776 is an apocalyptic number.

It is an amenable number.

6420254776 is an abundant number, since it is smaller than the sum of its proper divisors (7107377384).

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

6420254776 is a wasteful number, since it uses less digits than its factorization.

6420254776 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2684095 (or 2684091 counting only the distinct ones).

The product of its (nonzero) digits is 564480, while the sum is 43.

The square root of 6420254776 is about 80126.4923480368. The cubic root of 6420254776 is about 1858.5921029656.

The spelling of 6420254776 in words is "six billion, four hundred twenty million, two hundred fifty-four thousand, seven hundred seventy-six".