918190909101 has 4 divisors (see below), whose sum is σ = 1224254545472. Its totient is φ = 612127272732.

The previous prime is 918190909057. The next prime is 918190909157. The reversal of 918190909101 is 101909091819.

It is a happy number.

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 not a de Polignac number, because 918190909101 - 2¹⁵ = 918190876333 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (918190909001) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 153031818181 + ... + 153031818186.

It is an arithmetic number, because the mean of its divisors is an integer number (306063636368).

Almost surely, 2^918190909101 is an apocalyptic number.

It is an amenable number.

918190909101 is a deficient number, since it is larger than the sum of its proper divisors (306063636371).

918190909101 is a wasteful number, since it uses less digits than its factorization.

918190909101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 306063636370.

The product of its (nonzero) digits is 52488, while the sum is 48.

The spelling of 918190909101 in words is "nine hundred eighteen billion, one hundred ninety million, nine hundred nine thousand, one hundred one".