99157220640044 has 72 divisors (see below), whose sum is σ = 203769692935200. Its totient is φ = 42093491940864.

The previous prime is 99157220640029. The next prime is 99157220640097. The reversal of 99157220640044 is 44004602275199.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 33968657 + ... + 36772055.

It is an arithmetic number, because the mean of its divisors is an integer number (2830134624100).

Almost surely, 2^{99157220640044} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 99157220640044, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (101884846467600).

99157220640044 is an abundant number, since it is smaller than the sum of its proper divisors (104612472295156).

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

99157220640044 is a wasteful number, since it uses less digits than its factorization.

99157220640044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2805127 (or 2805118 counting only the distinct ones).

The product of its (nonzero) digits is 4354560, while the sum is 53.

The spelling of 99157220640044 in words is "ninety-nine trillion, one hundred fifty-seven billion, two hundred twenty million, six hundred forty thousand, forty-four".