891651416 has 8 divisors (see below), whose sum is σ = 1671846420. Its totient is φ = 445825704.

The previous prime is 891651403. The next prime is 891651421. The reversal of 891651416 is 614156198.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55728206 + ... + 55728221.

Almost surely, 2^891651416 is an apocalyptic number.

It is an amenable number.

891651416 is a deficient number, since it is larger than the sum of its proper divisors (780195004).

891651416 is a wasteful number, since it uses less digits than its factorization.

891651416 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111456433 (or 111456429 counting only the distinct ones).

The product of its digits is 51840, while the sum is 41.

The square root of 891651416 is about 29860.5327480941. The cubic root of 891651416 is about 962.4947468314.

The spelling of 891651416 in words is "eight hundred ninety-one million, six hundred fifty-one thousand, four hundred sixteen".