90090991002 has 8 divisors (see below), whose sum is σ = 180181982016. Its totient is φ = 30030330332.

The previous prime is 90090990959. The next prime is 90090991009. The reversal of 90090991002 is 20019909009.

It is a happy number.

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

90090991002 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (90090991009) 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 3 ways as a sum of consecutive naturals, for example, 7507582578 + ... + 7507582589.

It is an arithmetic number, because the mean of its divisors is an integer number (22522747752).

Almost surely, 2^90090991002 is an apocalyptic number.

90090991002 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

90090991002 is a wasteful number, since it uses less digits than its factorization.

90090991002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15015165172.

The product of its (nonzero) digits is 13122, while the sum is 39.

The spelling of 90090991002 in words is "ninety billion, ninety million, nine hundred ninety-one thousand, two".