468128691 has 12 divisors (see below), whose sum is σ = 678760368. Its totient is φ = 310897584.

The previous prime is 468128681. The next prime is 468128741. The reversal of 468128691 is 196821864.

468128691 is a `hidden beast` number, since 468 + 128 + 69 + 1 = 666.

It is a de Polignac number, because none of the positive numbers 2^k-468128691 is a prime.

It is not an unprimeable number, because it can be changed into a prime (468128671) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 96520 + ... + 101253.

It is an arithmetic number, because the mean of its divisors is an integer number (56563364).

Almost surely, 2^468128691 is an apocalyptic number.

468128691 is a deficient number, since it is larger than the sum of its proper divisors (210631677).

468128691 is a wasteful number, since it uses less digits than its factorization.

468128691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 198042 (or 198039 counting only the distinct ones).

The product of its digits is 165888, while the sum is 45.

The square root of 468128691 is about 21636.2818201280. The cubic root of 468128691 is about 776.4647655808.

The spelling of 468128691 in words is "four hundred sixty-eight million, one hundred twenty-eight thousand, six hundred ninety-one".