99709321572 has 96 divisors (see below), whose sum is σ = 305622508800. Its totient is φ = 27506013696.

The previous prime is 99709321567. The next prime is 99709321597. The reversal of 99709321572 is 27512390799.

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2252053 + ... + 2295900.

It is an arithmetic number, because the mean of its divisors is an integer number (3183567800).

Almost surely, 2^99709321572 is an apocalyptic number.

It is an amenable number.

99709321572 is an abundant number, since it is smaller than the sum of its proper divisors (205913187228).

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

99709321572 is a wasteful number, since it uses less digits than its factorization.

99709321572 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4548002 (or 4547994 counting only the distinct ones).

The product of its (nonzero) digits is 2143260, while the sum is 54.

The spelling of 99709321572 in words is "ninety-nine billion, seven hundred nine million, three hundred twenty-one thousand, five hundred seventy-two".