891123102540608 has 896 divisors, whose sum is σ = 2176109122682880. Its totient is φ = 354145913856000.

The previous prime is 891123102540581. The next prime is 891123102540659. The reversal of 891123102540608 is 806045201321198.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 1703868264635 + ... + 1703868265157.

It is an arithmetic number, because the mean of its divisors is an integer number (2428693217280).

Almost surely, 2^{891123102540608} 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 891123102540608, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1088054561341440).

891123102540608 is an abundant number, since it is smaller than the sum of its proper divisors (1284986020142272).

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

891123102540608 is a wasteful number, since it uses less digits than its factorization.

891123102540608 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1027 (or 1017 counting only the distinct ones).

The product of its (nonzero) digits is 829440, while the sum is 50.

The spelling of 891123102540608 in words is "eight hundred ninety-one trillion, one hundred twenty-three billion, one hundred two million, five hundred forty thousand, six hundred eight".