99388177789724 has 12 divisors (see below), whose sum is σ = 174011703051648. Its totient is φ = 49670548346400.

The previous prime is 99388177789721. The next prime is 99388177789757. The reversal of 99388177789724 is 42798777188399.

It is a self number, because there is not a number n which added to its sum of digits gives 99388177789724.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99388177789721) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5885127617 + ... + 5885144504.

It is an arithmetic number, because the mean of its divisors is an integer number (14500975254304).

Almost surely, 2^{99388177789724} is an apocalyptic number.

It is an amenable number.

99388177789724 is a deficient number, since it is larger than the sum of its proper divisors (74623525261924).

99388177789724 is a wasteful number, since it uses less digits than its factorization.

99388177789724 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11770274236 (or 11770274234 counting only the distinct ones).

The product of its digits is 21508042752, while the sum is 89.

The spelling of 99388177789724 in words is "ninety-nine trillion, three hundred eighty-eight billion, one hundred seventy-seven million, seven hundred eighty-nine thousand, seven hundred twenty-four".