99830188781 has 8 divisors (see below), whose sum is σ = 100275734880. Its totient is φ = 99384726672.

The previous prime is 99830188763. The next prime is 99830188813. The reversal of 99830188781 is 18788103899.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-99830188781 is a prime.

It is a super-2 number, since 2×99830188781² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99830188481) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4679966 + ... + 4701248.

It is an arithmetic number, because the mean of its divisors is an integer number (12534466860).

Almost surely, 2^99830188781 is an apocalyptic number.

It is an amenable number.

99830188781 is a deficient number, since it is larger than the sum of its proper divisors (445546099).

99830188781 is a wasteful number, since it uses less digits than its factorization.

99830188781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41995.

The product of its (nonzero) digits is 6967296, while the sum is 62.

The spelling of 99830188781 in words is "ninety-nine billion, eight hundred thirty million, one hundred eighty-eight thousand, seven hundred eighty-one".