90010191819 has 16 divisors (see below), whose sum is σ = 123882900768. Its totient is φ = 58088604672.

The previous prime is 90010191809. The next prime is 90010191827. The reversal of 90010191819 is 91819101009.

It is not a de Polignac number, because 90010191819 - 2²⁰ = 90009143243 is a prime.

It is a super-2 number, since 2×90010191819² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (90010191809) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2036262 + ... + 2079995.

It is an arithmetic number, because the mean of its divisors is an integer number (7742681298).

Almost surely, 2^90010191819 is an apocalyptic number.

90010191819 is a deficient number, since it is larger than the sum of its proper divisors (33872708949).

90010191819 is a wasteful number, since it uses less digits than its factorization.

90010191819 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4116494.

The product of its (nonzero) digits is 5832, while the sum is 39.

The spelling of 90010191819 in words is "ninety billion, ten million, one hundred ninety-one thousand, eight hundred nineteen".