891369721120 has 96 divisors (see below), whose sum is σ = 2110517192448. Its totient is φ = 355760391168.

The previous prime is 891369721117. The next prime is 891369721147. The reversal of 891369721120 is 21127963198.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 226061869 + ... + 226065811.

It is an arithmetic number, because the mean of its divisors is an integer number (21984554088).

Almost surely, 2^891369721120 is an apocalyptic number.

891369721120 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

891369721120 is an abundant number, since it is smaller than the sum of its proper divisors (1219147471328).

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

891369721120 is a wasteful number, since it uses less digits than its factorization.

891369721120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6722 (or 6714 counting only the distinct ones).

The product of its (nonzero) digits is 326592, while the sum is 49.

The spelling of 891369721120 in words is "eight hundred ninety-one billion, three hundred sixty-nine million, seven hundred twenty-one thousand, one hundred twenty".