1131169428180 has 144 divisors (see below), whose sum is σ = 3743724688704. Its totient is φ = 274180239360.

The previous prime is 1131169428139. The next prime is 1131169428211. The reversal of 1131169428180 is 818249611311.

1131169428180 is a `hidden beast` number, since 1 + 1 + 31 + 16 + 9 + 428 + 180 = 666.

It is a super-2 number, since 2×1131169428180² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 13773519 + ... + 13855401.

It is an arithmetic number, because the mean of its divisors is an integer number (25998088116).

Almost surely, 2^{1131169428180} is an apocalyptic number.

1131169428180 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1131169428180 is an abundant number, since it is smaller than the sum of its proper divisors (2612555260524).

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

1131169428180 is a wasteful number, since it uses less digits than its factorization.

1131169428180 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88886 (or 88881 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 45.

The spelling of 1131169428180 in words is "one trillion, one hundred thirty-one billion, one hundred sixty-nine million, four hundred twenty-eight thousand, one hundred eighty".