6420316881 has 32 divisors (see below), whose sum is σ = 9395481600. Its totient is φ = 3867497280.

The previous prime is 6420316871. The next prime is 6420316891. The reversal of 6420316881 is 1886130246.

6420316881 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (6420316871) and next prime (6420316891).

It is not a de Polignac number, because 6420316881 - 2⁶ = 6420316817 is a prime.

It is a super-2 number, since 2×6420316881² = 82440937704907136322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (6420316871) 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, 6985740 + ... + 6986658.

It is an arithmetic number, because the mean of its divisors is an integer number (293608800).

Almost surely, 2^6420316881 is an apocalyptic number.

It is an amenable number.

6420316881 is a deficient number, since it is larger than the sum of its proper divisors (2975164719).

6420316881 is a wasteful number, since it uses less digits than its factorization.

6420316881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1989.

The product of its (nonzero) digits is 55296, while the sum is 39.

The square root of 6420316881 is about 80126.8798905835. The cubic root of 6420316881 is about 1858.5980958477.

The spelling of 6420316881 in words is "six billion, four hundred twenty million, three hundred sixteen thousand, eight hundred eighty-one".