10919391940 has 12 divisors (see below), whose sum is σ = 22930723116. Its totient is φ = 4367756768.

The previous prime is 10919391893. The next prime is 10919391991. The reversal of 10919391940 is 4919391901.

It can be written as a sum of positive squares in 2 ways, for example, as 3760878276 + 7158513664 = 61326^2 + 84608^2 .

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, 272984779 + ... + 272984818.

It is an arithmetic number, because the mean of its divisors is an integer number (1910893593).

Almost surely, 2^10919391940 is an apocalyptic number.

10919391940 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

10919391940 is an abundant number, since it is smaller than the sum of its proper divisors (12011331176).

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

10919391940 is a wasteful number, since it uses less digits than its factorization.

10919391940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 545969606 (or 545969604 counting only the distinct ones).

The product of its (nonzero) digits is 78732, while the sum is 46.

The spelling of 10919391940 in words is "ten billion, nine hundred nineteen million, three hundred ninety-one thousand, nine hundred forty".