919145964191 has 16 divisors (see below), whose sum is σ = 1142457142848. Its totient is φ = 720036000000.

The previous prime is 919145964181. The next prime is 919145964193. The reversal of 919145964191 is 191469541919.

919145964191 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-919145964191 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 919145964191.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (919145964193) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 49993310 + ... + 50011691.

It is an arithmetic number, because the mean of its divisors is an integer number (71403571428).

Almost surely, 2^919145964191 is an apocalyptic number.

919145964191 is a gapful number since it is divisible by the number (91) formed by its first and last digit.

919145964191 is a deficient number, since it is larger than the sum of its proper divisors (223311178657).

919145964191 is a wasteful number, since it uses less digits than its factorization.

919145964191 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100005122.

The product of its digits is 3149280, while the sum is 59.

The spelling of 919145964191 in words is "nine hundred nineteen billion, one hundred forty-five million, nine hundred sixty-four thousand, one hundred ninety-one".