99243805554 has 32 divisors (see below), whose sum is σ = 225670674240. Its totient is φ = 32311935936.

The previous prime is 99243805547. The next prime is 99243805559. The reversal of 99243805554 is 45550834299.

99243805554 is a `hidden beast` number, since 9 + 9 + 2 + 4 + 3 + 80 + 5 + 554 = 666.

It is a super-2 number, since 2×99243805554² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a self number, because there is not a number n which added to its sum of digits gives 99243805554.

It is not an unprimeable number, because it can be changed into a prime (99243805559) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21368007 + ... + 21372650.

It is an arithmetic number, because the mean of its divisors is an integer number (7052208570).

Almost surely, 2^99243805554 is an apocalyptic number.

99243805554 is an abundant number, since it is smaller than the sum of its proper divisors (126426868686).

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

99243805554 is a wasteful number, since it uses less digits than its factorization.

99243805554 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42740711 (or 42740705 counting only the distinct ones).

The product of its (nonzero) digits is 7776000, while the sum is 54.

The spelling of 99243805554 in words is "ninety-nine billion, two hundred forty-three million, eight hundred five thousand, five hundred fifty-four".