90910091010 has 32 divisors (see below), whose sum is σ = 221440704192. Its totient is φ = 23880859200.

The previous prime is 90910091003. The next prime is 90910091017. The reversal of 90910091010 is 1019001909.

It is an interprime number because it is at equal distance from previous prime (90910091003) and next prime (90910091017).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is not an unprimeable number, because it can be changed into a prime (90910091017) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 22612441 + ... + 22616460.

It is an arithmetic number, because the mean of its divisors is an integer number (6920022006).

Almost surely, 2^90910091010 is an apocalyptic number.

90910091010 is an abundant number, since it is smaller than the sum of its proper divisors (130530613182).

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

90910091010 is a wasteful number, since it uses less digits than its factorization.

90910091010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45228978.

The product of its (nonzero) digits is 729, while the sum is 30.

Adding to 90910091010 its reverse (1019001909), we get a palindrome (91929092919).

The spelling of 90910091010 in words is "ninety billion, nine hundred ten million, ninety-one thousand, ten".