819944464516 has 48 divisors (see below), whose sum is σ = 1517573094912. Its totient is φ = 387005126400.

The previous prime is 819944464489. The next prime is 819944464541. The reversal of 819944464516 is 615464449918.

It is a super-2 number, since 2×819944464516² (a number of 25 digits) contains 22 as substring.

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, 44104575 + ... + 44123161.

It is an arithmetic number, because the mean of its divisors is an integer number (31616106144).

Almost surely, 2^819944464516 is an apocalyptic number.

It is an amenable number.

819944464516 is a deficient number, since it is larger than the sum of its proper divisors (697628630396).

819944464516 is a wasteful number, since it uses less digits than its factorization.

819944464516 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27340 (or 27338 counting only the distinct ones).

The product of its digits is 29859840, while the sum is 61.

The spelling of 819944464516 in words is "eight hundred nineteen billion, nine hundred forty-four million, four hundred sixty-four thousand, five hundred sixteen".