6421881246 has 32 divisors (see below), whose sum is σ = 14390068608. Its totient is φ = 1893428640.

The previous prime is 6421881239. The next prime is 6421881253.

6421881246 is nontrivially palindromic in base 10.

It is an interprime number because it is at equal distance from previous prime (6421881239) and next prime (6421881253).

It is a junction number, because it is equal to n+sod(n) for n = 6421881198 and 6421881207.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1312440 + ... + 1317323.

It is an arithmetic number, because the mean of its divisors is an integer number (449689644).

Almost surely, 2^6421881246 is an apocalyptic number.

6421881246 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

6421881246 is an abundant number, since it is smaller than the sum of its proper divisors (7968187362).

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

6421881246 is a wasteful number, since it uses less digits than its factorization.

6421881246 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2629816.

The product of its digits is 147456, while the sum is 42.

The square root of 6421881246 is about 80136.6410950696. The cubic root of 6421881246 is about 1858.7490380182.

The spelling of 6421881246 in words is "six billion, four hundred twenty-one million, eight hundred eighty-one thousand, two hundred forty-six".