909190919091 has 64 divisors (see below), whose sum is σ = 1532653423616. Its totient is φ = 466513344000.

The previous prime is 909190919083. The next prime is 909190919101. The reversal of 909190919091 is 190919091909.

It is not a de Polignac number, because 909190919091 - 2³ = 909190919083 is a prime.

909190919091 is a modest number, since divided by 90919091 gives 9091 as remainder.

It is not an unprimeable number, because it can be changed into a prime (909190119091) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 91823241 + ... + 91833141.

It is an arithmetic number, because the mean of its divisors is an integer number (23947709744).

Almost surely, 2^909190919091 is an apocalyptic number.

909190919091 is a gapful number since it is divisible by the number (91) formed by its first and last digit.

909190919091 is a deficient number, since it is larger than the sum of its proper divisors (623462504525).

909190919091 is a wasteful number, since it uses less digits than its factorization.

909190919091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19052.

The product of its (nonzero) digits is 531441, while the sum is 57.

It can be divided in two parts, 909190 and 919091, that added together give a palindrome (1828281).

The spelling of 909190919091 in words is "nine hundred nine billion, one hundred ninety million, nine hundred nineteen thousand, ninety-one".