1195631281280 has 128 divisors (see below), whose sum is σ = 3062907146880. Its totient is φ = 444696543232.

The previous prime is 1195631281267. The next prime is 1195631281303. The reversal of 1195631281280 is 821821365911.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (128).

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, 241037 + ... + 1565043.

It is an arithmetic number, because the mean of its divisors is an integer number (23928962085).

Almost surely, 2^{1195631281280} is an apocalyptic number.

1195631281280 is a gapful number since it is divisible by the number (10) 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 1195631281280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1531453573440).

1195631281280 is an abundant number, since it is smaller than the sum of its proper divisors (1867275865600).

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

1195631281280 is a wasteful number, since it uses less digits than its factorization.

1195631281280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1324126 (or 1324114 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 47.

The spelling of 1195631281280 in words is "one trillion, one hundred ninety-five billion, six hundred thirty-one million, two hundred eighty-one thousand, two hundred eighty".