919949688208 has 20 divisors (see below), whose sum is σ = 1787509702300. Its totient is φ = 458656861824.

The previous prime is 919949688199. The next prime is 919949688227. The reversal of 919949688208 is 802886949919.

It can be written as a sum of positive squares in 2 ways, for example, as 381093859584 + 538855828624 = 617328^2 + 734068^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 82368135 + ... + 82379302.

It is an arithmetic number, because the mean of its divisors is an integer number (89375485115).

Almost surely, 2^919949688208 is an apocalyptic number.

It is an amenable number.

919949688208 is a deficient number, since it is larger than the sum of its proper divisors (867560014092).

919949688208 is a wasteful number, since it uses less digits than its factorization.

919949688208 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 164747794 (or 164747788 counting only the distinct ones).

The product of its (nonzero) digits is 161243136, while the sum is 73.

The spelling of 919949688208 in words is "nine hundred nineteen billion, nine hundred forty-nine million, six hundred eighty-eight thousand, two hundred eight".