90910100090 has 16 divisors (see below), whose sum is σ = 172250716320. Its totient is φ = 34450143120.

The previous prime is 90910100077. The next prime is 90910100107. The reversal of 90910100090 is 9000101909.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 239236916 + ... + 239237295.

It is an arithmetic number, because the mean of its divisors is an integer number (10765669770).

Almost surely, 2^90910100090 is an apocalyptic number.

90910100090 is a deficient number, since it is larger than the sum of its proper divisors (81340616230).

90910100090 is a wasteful number, since it uses less digits than its factorization.

90910100090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 478474237.

The product of its (nonzero) digits is 729, while the sum is 29.

Adding to 90910100090 its reverse (9000101909), we get a palindrome (99910201999).

The spelling of 90910100090 in words is "ninety billion, nine hundred ten million, one hundred thousand, ninety".