90919091910 has 16 divisors (see below), whose sum is σ = 218205820656. Its totient is φ = 24245091168.

The previous prime is 90919091869. The next prime is 90919091953. The reversal of 90919091910 is 1919091909.

It is a self number, because there is not a number n which added to its sum of digits gives 90919091910.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1515318169 + ... + 1515318228.

It is an arithmetic number, because the mean of its divisors is an integer number (13637863791).

Almost surely, 2^90919091910 is an apocalyptic number.

90919091910 is an abundant number, since it is smaller than the sum of its proper divisors (127286728746).

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

90919091910 is a wasteful number, since it uses less digits than its factorization.

90919091910 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3030636407.

The product of its (nonzero) digits is 59049, while the sum is 48.

The spelling of 90919091910 in words is "ninety billion, nine hundred nineteen million, ninety-one thousand, nine hundred ten".