891600966522 has 192 divisors, whose sum is σ = 2315411804160. Its totient is φ = 242439132672.

The previous prime is 891600966493. The next prime is 891600966523. The reversal of 891600966522 is 225669006198.

It is a happy number.

891600966522 is a `hidden beast` number, since 8 + 9 + 1 + 600 + 9 + 6 + 6 + 5 + 22 = 666.

It is not an unprimeable number, because it can be changed into a prime (891600966523) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 611103429 + ... + 611104887.

It is an arithmetic number, because the mean of its divisors is an integer number (12059436480).

Almost surely, 2^891600966522 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 891600966522, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1157705902080).

891600966522 is an abundant number, since it is smaller than the sum of its proper divisors (1423810837638).

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

891600966522 is a wasteful number, since it uses less digits than its factorization.

891600966522 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2417 (or 2414 counting only the distinct ones).

The product of its (nonzero) digits is 2799360, while the sum is 54.

The spelling of 891600966522 in words is "eight hundred ninety-one billion, six hundred million, nine hundred sixty-six thousand, five hundred twenty-two".