897497781120 has 640 divisors, whose sum is σ = 3250142280000. Its totient is φ = 235996250112.

The previous prime is 897497781113. The next prime is 897497781133. The reversal of 897497781120 is 21187794798.

It is a tau number, because it is divible by the number of its divisors (640).

It is a congruent number.

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 79 ways as a sum of consecutive naturals, for example, 2044413861 + ... + 2044414299.

Almost surely, 2^897497781120 is an apocalyptic number.

897497781120 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 897497781120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1625071140000).

897497781120 is an abundant number, since it is smaller than the sum of its proper divisors (2352644498880).

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

897497781120 is a wasteful number, since it uses less digits than its factorization.

897497781120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 932 (or 911 counting only the distinct ones).

The product of its (nonzero) digits is 14224896, while the sum is 63.

The spelling of 897497781120 in words is "eight hundred ninety-seven billion, four hundred ninety-seven million, seven hundred eighty-one thousand, one hundred twenty".