99518391580 has 24 divisors (see below), whose sum is σ = 210038824800. Its totient is φ = 39607318080.

The previous prime is 99518391571. The next prime is 99518391587. The reversal of 99518391580 is 8519381599.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99518391587) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 12498331 + ... + 12506290.

It is an arithmetic number, because the mean of its divisors is an integer number (8751617700).

Almost surely, 2^99518391580 is an apocalyptic number.

It is an amenable number.

99518391580 is an abundant number, since it is smaller than the sum of its proper divisors (110520433220).

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

99518391580 is a wasteful number, since it uses less digits than its factorization.

99518391580 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25004829 (or 25004827 counting only the distinct ones).

The product of its (nonzero) digits is 3499200, while the sum is 58.

The spelling of 99518391580 in words is "ninety-nine billion, five hundred eighteen million, three hundred ninety-one thousand, five hundred eighty".