1131911433556 has 12 divisors (see below), whose sum is σ = 1980853701568. Its totient is φ = 565953233112.

The previous prime is 1131911433473. The next prime is 1131911433557. The reversal of 1131911433556 is 6553341191311.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1131911433557) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 732085 + ... + 1673251.

Almost surely, 2^{1131911433556} is an apocalyptic number.

It is an amenable number.

1131911433556 is a deficient number, since it is larger than the sum of its proper divisors (848942268012).

1131911433556 is a wasteful number, since it uses less digits than its factorization.

1131911433556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1241838 (or 1241836 counting only the distinct ones).

The product of its digits is 145800, while the sum is 43.

The spelling of 1131911433556 in words is "one trillion, one hundred thirty-one billion, nine hundred eleven million, four hundred thirty-three thousand, five hundred fifty-six".