1131431000660 has 12 divisors (see below), whose sum is σ = 2376005101428. Its totient is φ = 452572400256.

The previous prime is 1131431000657. The next prime is 1131431000671. The reversal of 1131431000660 is 660001341311.

It can be written as a sum of positive squares in 2 ways, for example, as 562209037636 + 569221963024 = 749806^2 + 754468^2 .

It is a super-2 number, since 2×1131431000660² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28285774997 + ... + 28285775036.

It is an arithmetic number, because the mean of its divisors is an integer number (198000425119).

Almost surely, 2^{1131431000660} is an apocalyptic number.

1131431000660 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1131431000660 is an abundant number, since it is smaller than the sum of its proper divisors (1244574100768).

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

1131431000660 is a wasteful number, since it uses less digits than its factorization.

1131431000660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56571550042 (or 56571550040 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 26.

Adding to 1131431000660 its reverse (660001341311), we get a palindrome (1791432341971).

The spelling of 1131431000660 in words is "one trillion, one hundred thirty-one billion, four hundred thirty-one million, six hundred sixty", and thus it is an aban number.