99540797015 has 24 divisors (see below), whose sum is σ = 132569926944. Its totient is φ = 71690414400.

The previous prime is 99540797003. The next prime is 99540797021. The reversal of 99540797015 is 51079704599.

It is not a de Polignac number, because 99540797015 - 2²⁰ = 99539748439 is a prime.

It is a Duffinian number.

It is a congruent number.

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 23 ways as a sum of consecutive naturals, for example, 736376 + ... + 861005.

It is an arithmetic number, because the mean of its divisors is an integer number (5523746956).

Almost surely, 2^99540797015 is an apocalyptic number.

99540797015 is a deficient number, since it is larger than the sum of its proper divisors (33029129929).

99540797015 is a wasteful number, since it uses less digits than its factorization.

99540797015 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1597511 (or 1597500 counting only the distinct ones).

The product of its (nonzero) digits is 3572100, while the sum is 56.

The spelling of 99540797015 in words is "ninety-nine billion, five hundred forty million, seven hundred ninety-seven thousand, fifteen".