919191919102 has 32 divisors (see below), whose sum is σ = 1454859014400. Its totient is φ = 434356832448.

The previous prime is 919191919097. The next prime is 919191919193. The reversal of 919191919102 is 201919191919.

It is a self number, because there is not a number n which added to its sum of digits gives 919191919102.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 30910413 + ... + 30940135.

It is an arithmetic number, because the mean of its divisors is an integer number (45464344200).

Almost surely, 2^919191919102 is an apocalyptic number.

919191919102 is a deficient number, since it is larger than the sum of its proper divisors (535667095298).

919191919102 is a wasteful number, since it uses less digits than its factorization.

919191919102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31680.

The product of its (nonzero) digits is 118098, while the sum is 52.

The spelling of 919191919102 in words is "nine hundred nineteen billion, one hundred ninety-one million, nine hundred nineteen thousand, one hundred two".