997367774688 has 144 divisors (see below), whose sum is σ = 2877042941136. Its totient is φ = 327682160640.

The previous prime is 997367774671. The next prime is 997367774749. The reversal of 997367774688 is 886477763799.

997367774688 is a `hidden beast` number, since 9 + 97 + 3 + 67 + 7 + 7 + 468 + 8 = 666.

997367774688 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (144).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 33013606 + ... + 33043802.

It is an arithmetic number, because the mean of its divisors is an integer number (19979464869).

Almost surely, 2^997367774688 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 997367774688, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1438521470568).

997367774688 is an abundant number, since it is smaller than the sum of its proper divisors (1879675166448).

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

997367774688 is a wasteful number, since it uses less digits than its factorization.

997367774688 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31857 (or 31846 counting only the distinct ones).

The product of its digits is 5377010688, while the sum is 81.

The spelling of 997367774688 in words is "nine hundred ninety-seven billion, three hundred sixty-seven million, seven hundred seventy-four thousand, six hundred eighty-eight".