891164672 has 24 divisors (see below), whose sum is σ = 1781898300. Its totient is φ = 445581312.

The previous prime is 891164663. The next prime is 891164683. The reversal of 891164672 is 276461198.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 215522 + ... + 219617.

Almost surely, 2^891164672 is an apocalyptic number.

It is an amenable number.

891164672 is a deficient number, since it is larger than the sum of its proper divisors (890733628).

891164672 is an equidigital number, since it uses as much as digits as its factorization.

891164672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 435161 (or 435141 counting only the distinct ones).

The product of its digits is 145152, while the sum is 44.

The square root of 891164672 is about 29852.3813455476. The cubic root of 891164672 is about 962.3195760534.

The spelling of 891164672 in words is "eight hundred ninety-one million, one hundred sixty-four thousand, six hundred seventy-two".