99400165601 has 4 divisors (see below), whose sum is σ = 108436544304. Its totient is φ = 90363786900.

The previous prime is 99400165561. The next prime is 99400165633. The reversal of 99400165601 is 10656100499.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 99400165601 - 2¹⁸ = 99399903457 is a prime.

It is not an unprimeable number, because it can be changed into a prime (99400165801) 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 3 ways as a sum of consecutive naturals, for example, 4518189335 + ... + 4518189356.

It is an arithmetic number, because the mean of its divisors is an integer number (27109136076).

Almost surely, 2^99400165601 is an apocalyptic number.

It is an amenable number.

99400165601 is a deficient number, since it is larger than the sum of its proper divisors (9036378703).

99400165601 is a wasteful number, since it uses less digits than its factorization.

99400165601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9036378702.

The product of its (nonzero) digits is 58320, while the sum is 41.

The spelling of 99400165601 in words is "ninety-nine billion, four hundred million, one hundred sixty-five thousand, six hundred one".