90209309826 has 16 divisors (see below), whose sum is σ = 182170257984. Its totient is φ = 29777830224.

The previous prime is 90209309717. The next prime is 90209309843. The reversal of 90209309826 is 62890390209.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 72984261 + ... + 72985496.

It is an arithmetic number, because the mean of its divisors is an integer number (11385641124).

Almost surely, 2^90209309826 is an apocalyptic number.

90209309826 is an abundant number, since it is smaller than the sum of its proper divisors (91960948158).

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

90209309826 is a wasteful number, since it uses less digits than its factorization.

90209309826 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 145969865.

The product of its (nonzero) digits is 419904, while the sum is 48.

The spelling of 90209309826 in words is "ninety billion, two hundred nine million, three hundred nine thousand, eight hundred twenty-six".