90858780091 has 8 divisors (see below), whose sum is σ = 96457255920. Its totient is φ = 85288508928.

The previous prime is 90858780053. The next prime is 90858780097. The reversal of 90858780091 is 19008785809.

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

It is a cyclic number.

It is not a de Polignac number, because 90858780091 - 2⁹ = 90858779579 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (90858780097) 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 7 ways as a sum of consecutive naturals, for example, 7044526 + ... + 7057411.

It is an arithmetic number, because the mean of its divisors is an integer number (12057156990).

Almost surely, 2^90858780091 is an apocalyptic number.

90858780091 is a deficient number, since it is larger than the sum of its proper divisors (5598475829).

90858780091 is a wasteful number, since it uses less digits than its factorization.

90858780091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14102333.

The product of its (nonzero) digits is 1451520, while the sum is 55.

The spelling of 90858780091 in words is "ninety billion, eight hundred fifty-eight million, seven hundred eighty thousand, ninety-one".