99956321771 has 8 divisors (see below), whose sum is σ = 101243306160. Its totient is φ = 98672979328.

The previous prime is 99956321687. The next prime is 99956321809. The reversal of 99956321771 is 17712365999.

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

It is a cyclic number.

It is not a de Polignac number, because 99956321771 - 2³⁴ = 82776452587 is a prime.

It is a super-3 number, since 3×99956321771³ (a number of 34 digits) contains 333 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 99956321771.

It is not an unprimeable number, because it can be changed into a prime (99956371771) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 855221 + ... + 965046.

It is an arithmetic number, because the mean of its divisors is an integer number (12655413270).

Almost surely, 2^99956321771 is an apocalyptic number.

99956321771 is a deficient number, since it is larger than the sum of its proper divisors (1286984389).

99956321771 is a wasteful number, since it uses less digits than its factorization.

99956321771 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1820973.

The product of its digits is 6429780, while the sum is 59.

The spelling of 99956321771 in words is "ninety-nine billion, nine hundred fifty-six million, three hundred twenty-one thousand, seven hundred seventy-one".