1155212155444 has 6 divisors (see below), whose sum is σ = 2021621272034. Its totient is φ = 577606077720.

The previous prime is 1155212155429. The next prime is 1155212155453. The reversal of 1155212155444 is 4445512125511.

It can be written as a sum of positive squares in only one way, i.e., 985278582544 + 169933572900 = 992612^2 + 412230^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1155212155397 and 1155212155406.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 144401519427 + ... + 144401519434.

Almost surely, 2^{1155212155444} is an apocalyptic number.

It is an amenable number.

1155212155444 is a deficient number, since it is larger than the sum of its proper divisors (866409116590).

1155212155444 is a wasteful number, since it uses less digits than its factorization.

1155212155444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 288803038865 (or 288803038863 counting only the distinct ones).

The product of its digits is 160000, while the sum is 40.

The spelling of 1155212155444 in words is "one trillion, one hundred fifty-five billion, two hundred twelve million, one hundred fifty-five thousand, four hundred forty-four".