1131538532644 has 81 divisors (see below), whose sum is σ = 2166097277169. Its totient is φ = 516976668000.

The previous prime is 1131538532599. The next prime is 1131538532651. The reversal of 1131538532644 is 4462358351311.

The square root of 1131538532644 is 1063738.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 167387356900 + 964151175744 = 409130^2 + 981912^2 .

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1131538532594 and 1131538532603.

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 4508121519 + ... + 4508121769.

Almost surely, 2^{1131538532644} is an apocalyptic number.

1131538532644 is the 1063738-th square number.

It is an amenable number.

1131538532644 is a deficient number, since it is larger than the sum of its proper divisors (1034558744525).

1131538532644 is an equidigital number, since it uses as much as digits as its factorization.

1131538532644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 858 (or 429 counting only the distinct ones).

The product of its digits is 1036800, while the sum is 46.

The spelling of 1131538532644 in words is "one trillion, one hundred thirty-one billion, five hundred thirty-eight million, five hundred thirty-two thousand, six hundred forty-four".