90918201009 has 8 divisors (see below), whose sum is σ = 121227097120. Its totient is φ = 60610719456.

The previous prime is 90918200959. The next prime is 90918201013. The reversal of 90918201009 is 90010281909.

It is a happy number.

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

It is not a de Polignac number, because 90918201009 - 2⁷ = 90918200881 is a prime.

It is a super-2 number, since 2×90918201009² (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 (90918201089) 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, 193279 + ... + 468180.

It is an arithmetic number, because the mean of its divisors is an integer number (15153387140).

Almost surely, 2^90918201009 is an apocalyptic number.

It is an amenable number.

90918201009 is a deficient number, since it is larger than the sum of its proper divisors (30308896111).

90918201009 is a wasteful number, since it uses less digits than its factorization.

90918201009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 707279.

The product of its (nonzero) digits is 11664, while the sum is 39.

The spelling of 90918201009 in words is "ninety billion, nine hundred eighteen million, two hundred one thousand, nine".