1198631323656 has 448 divisors, whose sum is σ = 3712882788720. Its totient is φ = 360326154240.

The previous prime is 1198631323633. The next prime is 1198631323663. The reversal of 1198631323656 is 6563231368911.

1198631323656 is a `hidden beast` number, since 1 + 1 + 98 + 6 + 313 + 236 + 5 + 6 = 666.

It can be written as a sum of positive squares in 8 ways, for example, as 267340702500 + 931290621156 = 517050^2 + 965034^2 .

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 111 ways as a sum of consecutive naturals, for example, 1273784146 + ... + 1273785086.

Almost surely, 2^{1198631323656} 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 1198631323656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1856441394360).

1198631323656 is an abundant number, since it is smaller than the sum of its proper divisors (2514251465064).

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

1198631323656 is a wasteful number, since it uses less digits than its factorization.

1198631323656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1348 (or 1329 counting only the distinct ones).

The product of its digits is 4199040, while the sum is 54.

The spelling of 1198631323656 in words is "one trillion, one hundred ninety-eight billion, six hundred thirty-one million, three hundred twenty-three thousand, six hundred fifty-six".