99690558987 has 8 divisors (see below), whose sum is σ = 132922241536. Its totient is φ = 66459624552.

The previous prime is 99690558971. The next prime is 99690558991. The reversal of 99690558987 is 78985509699.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 99690558987 - 2⁴ = 99690558971 is a prime.

It is a super-2 number, since 2×99690558987² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (99690558907) 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, 321198 + ... + 550044.

It is an arithmetic number, because the mean of its divisors is an integer number (16615280192).

Almost surely, 2^99690558987 is an apocalyptic number.

99690558987 is a deficient number, since it is larger than the sum of its proper divisors (33231682549).

99690558987 is a wasteful number, since it uses less digits than its factorization.

99690558987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 374057.

The product of its (nonzero) digits is 440899200, while the sum is 75.

The spelling of 99690558987 in words is "ninety-nine billion, six hundred ninety million, five hundred fifty-eight thousand, nine hundred eighty-seven".