919191001010 has 16 divisors (see below), whose sum is σ = 1654561985472. Its totient is φ = 367672359600.

The previous prime is 919191001007. The next prime is 919191001019. The reversal of 919191001010 is 10100191919.

It is not an unprimeable number, because it can be changed into a prime (919191001019) 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, 556565 + ... + 1465655.

It is an arithmetic number, because the mean of its divisors is an integer number (103410124092).

Almost surely, 2^919191001010 is an apocalyptic number.

919191001010 is a deficient number, since it is larger than the sum of its proper divisors (735370984462).

919191001010 is a wasteful number, since it uses less digits than its factorization.

919191001010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1010209.

The product of its (nonzero) digits is 729, while the sum is 32.

Adding to 919191001010 its reverse (10100191919), we get a palindrome (929291192929).

The spelling of 919191001010 in words is "nine hundred nineteen billion, one hundred ninety-one million, one thousand, ten".