90910109202 has 16 divisors (see below), whose sum is σ = 198349329312. Its totient is φ = 27548517920.

The previous prime is 90910109201. The next prime is 90910109263. The reversal of 90910109202 is 20290101909.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is not an unprimeable number, because it can be changed into a prime (90910109201) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 688712883 + ... + 688713014.

It is an arithmetic number, because the mean of its divisors is an integer number (12396833082).

Almost surely, 2^90910109202 is an apocalyptic number.

90910109202 is an abundant number, since it is smaller than the sum of its proper divisors (107439220110).

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

90910109202 is a wasteful number, since it uses less digits than its factorization.

90910109202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1377425913.

The product of its (nonzero) digits is 2916, while the sum is 33.

The spelling of 90910109202 in words is "ninety billion, nine hundred ten million, one hundred nine thousand, two hundred two".