1131203442656 has 72 divisors (see below), whose sum is σ = 2679991022520. Its totient is φ = 468084164352.

The previous prime is 1131203442619. The next prime is 1131203442661. The reversal of 1131203442656 is 6562443021311.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12392990 + ... + 12483933.

It is an arithmetic number, because the mean of its divisors is an integer number (37222097535).

Almost surely, 2^{1131203442656} is an apocalyptic number.

1131203442656 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1131203442656 is an abundant number, since it is smaller than the sum of its proper divisors (1548787579864).

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

1131203442656 is a wasteful number, since it uses less digits than its factorization.

1131203442656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24876976 (or 24876961 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 38.

Adding to 1131203442656 its reverse (6562443021311), we get a palindrome (7693646463967).

The spelling of 1131203442656 in words is "one trillion, one hundred thirty-one billion, two hundred three million, four hundred forty-two thousand, six hundred fifty-six".