99724545774 has 48 divisors (see below), whose sum is σ = 247056282720. Its totient is φ = 28478960640.

The previous prime is 99724545773. The next prime is 99724545787. The reversal of 99724545774 is 47754542799.

99724545774 is a `hidden beast` number, since 9 + 9 + 7 + 2 + 4 + 54 + 577 + 4 = 666.

99724545774 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99724545773) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 72042 + ... + 452370.

It is an arithmetic number, because the mean of its divisors is an integer number (5147005890).

Almost surely, 2^99724545774 is an apocalyptic number.

99724545774 is an abundant number, since it is smaller than the sum of its proper divisors (147331736946).

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

99724545774 is a wasteful number, since it uses less digits than its factorization.

99724545774 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 382425 (or 382422 counting only the distinct ones).

The product of its digits is 88905600, while the sum is 63.

The spelling of 99724545774 in words is "ninety-nine billion, seven hundred twenty-four million, five hundred forty-five thousand, seven hundred seventy-four".