99437843772 has 18 divisors (see below), whose sum is σ = 251356771848. Its totient is φ = 33145947912.

The previous prime is 99437843719. The next prime is 99437843779. The reversal of 99437843772 is 27734873499.

99437843772 is a `hidden beast` number, since 99 + 43 + 7 + 8 + 437 + 72 = 666.

It is a tau number, because it is divible by the number of its divisors (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99437843779) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1381081128 + ... + 1381081199.

Almost surely, 2^99437843772 is an apocalyptic number.

It is an amenable number.

99437843772 is an abundant number, since it is smaller than the sum of its proper divisors (151918928076).

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

99437843772 is a wasteful number, since it uses less digits than its factorization.

99437843772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2762162337 (or 2762162332 counting only the distinct ones).

The product of its digits is 64012032, while the sum is 63.

The spelling of 99437843772 in words is "ninety-nine billion, four hundred thirty-seven million, eight hundred forty-three thousand, seven hundred seventy-two".