891955036416 has 72 divisors (see below), whose sum is σ = 2375759841280. Its totient is φ = 297085556736.

The previous prime is 891955036393. The next prime is 891955036481. The reversal of 891955036416 is 614630559198.

It is a super-2 number, since 2×891955036416² (a number of 25 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 528246 + ... + 1436298.

Almost surely, 2^891955036416 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 891955036416, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1187879920640).

891955036416 is an abundant number, since it is smaller than the sum of its proper divisors (1483804804864).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

891955036416 is a wasteful number, since it uses less digits than its factorization.

891955036416 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 909351 (or 909337 counting only the distinct ones).

The product of its (nonzero) digits is 6998400, while the sum is 57.

The spelling of 891955036416 in words is "eight hundred ninety-one billion, nine hundred fifty-five million, thirty-six thousand, four hundred sixteen".