99943451864 has 16 divisors (see below), whose sum is σ = 189145319400. Its totient is φ = 49504700032.

The previous prime is 99943451819. The next prime is 99943451897. The reversal of 99943451864 is 46815434999.

It is a junction number, because it is equal to n+sod(n) for n = 99943451797 and 99943451806.

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, 58377329 + ... + 58379040.

Almost surely, 2^99943451864 is an apocalyptic number.

It is an amenable number.

99943451864 is a deficient number, since it is larger than the sum of its proper divisors (89201867536).

99943451864 is a wasteful number, since it uses less digits than its factorization.

99943451864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 116756482 (or 116756478 counting only the distinct ones).

The product of its digits is 33592320, while the sum is 62.

The spelling of 99943451864 in words is "ninety-nine billion, nine hundred forty-three million, four hundred fifty-one thousand, eight hundred sixty-four".