621146817848 has 16 divisors (see below), whose sum is σ = 1164698928960. Its totient is φ = 310560436800.

The previous prime is 621146817803. The next prime is 621146817869. The reversal of 621146817848 is 848718641126.

It is a super-2 number, since 2×621146817848² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 621146817793 and 621146817802.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1416488 + ... + 1802423.

It is an arithmetic number, because the mean of its divisors is an integer number (72793683060).

Almost surely, 2^621146817848 is an apocalyptic number.

It is an amenable number.

621146817848 is a deficient number, since it is larger than the sum of its proper divisors (543552111112).

621146817848 is a wasteful number, since it uses less digits than its factorization.

621146817848 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3243038 (or 3243034 counting only the distinct ones).

The product of its digits is 4128768, while the sum is 56.

The spelling of 621146817848 in words is "six hundred twenty-one billion, one hundred forty-six million, eight hundred seventeen thousand, eight hundred forty-eight".