6421451808846 has 16 divisors (see below), whose sum is σ = 13518845913600. Its totient is φ = 2027826886968.

The previous prime is 6421451808787. The next prime is 6421451808883. The reversal of 6421451808846 is 6488081541246.

It is a Harshad number since it is a multiple of its sum of digits (57).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28164262206 + ... + 28164262433.

It is an arithmetic number, because the mean of its divisors is an integer number (844927869600).

Almost surely, 2^{6421451808846} is an apocalyptic number.

6421451808846 is an abundant number, since it is smaller than the sum of its proper divisors (7097394104754).

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

6421451808846 is a wasteful number, since it uses less digits than its factorization.

6421451808846 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56328524663.

The product of its (nonzero) digits is 11796480, while the sum is 57.

The spelling of 6421451808846 in words is "six trillion, four hundred twenty-one billion, four hundred fifty-one million, eight hundred eight thousand, eight hundred forty-six".