1155485644 has 6 divisors (see below), whose sum is σ = 2022099884. Its totient is φ = 577742820.

The previous prime is 1155485629. The next prime is 1155485659. The reversal of 1155485644 is 4465845511.

It is an interprime number because it is at equal distance from previous prime (1155485629) and next prime (1155485659).

It is a self number, because there is not a number n which added to its sum of digits gives 1155485644.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 144435702 + ... + 144435709.

Almost surely, 2^1155485644 is an apocalyptic number.

It is an amenable number.

1155485644 is a deficient number, since it is larger than the sum of its proper divisors (866614240).

1155485644 is a wasteful number, since it uses less digits than its factorization.

1155485644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 288871415 (or 288871413 counting only the distinct ones).

The product of its digits is 384000, while the sum is 43.

The square root of 1155485644 is about 33992.4350995924. The cubic root of 1155485644 is about 1049.3527814851.

The spelling of 1155485644 in words is "one billion, one hundred fifty-five million, four hundred eighty-five thousand, six hundred forty-four".