99511382320 has 160 divisors (see below), whose sum is σ = 276693719040. Its totient is φ = 32542371840.

The previous prime is 99511382261. The next prime is 99511382339. The reversal of 99511382320 is 2328311599.

It is a super-2 number, since 2×99511382320² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4613160 + ... + 4634680.

It is an arithmetic number, because the mean of its divisors is an integer number (1729335744).

Almost surely, 2^99511382320 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 99511382320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (138346859520).

99511382320 is an abundant number, since it is smaller than the sum of its proper divisors (177182336720).

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

99511382320 is a wasteful number, since it uses less digits than its factorization.

99511382320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21923 (or 21917 counting only the distinct ones).

The product of its (nonzero) digits is 116640, while the sum is 43.

The spelling of 99511382320 in words is "ninety-nine billion, five hundred eleven million, three hundred eighty-two thousand, three hundred twenty".