99311515240 has 64 divisors (see below), whose sum is σ = 258449304960. Its totient is φ = 33639417600.

The previous prime is 99311515223. The next prime is 99311515253. The reversal of 99311515240 is 4251511399.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a junction number, because it is equal to n+sod(n) for n = 99311515193 and 99311515202.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2113411 + ... + 2159890.

It is an arithmetic number, because the mean of its divisors is an integer number (4038270390).

Almost surely, 2^99311515240 is an apocalyptic number.

It is an amenable number.

99311515240 is an abundant number, since it is smaller than the sum of its proper divisors (159137789720).

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

99311515240 is a wasteful number, since it uses less digits than its factorization.

99311515240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4273402 (or 4273398 counting only the distinct ones).

The product of its (nonzero) digits is 48600, while the sum is 40.

The spelling of 99311515240 in words is "ninety-nine billion, three hundred eleven million, five hundred fifteen thousand, two hundred forty".