1158881644 has 12 divisors (see below), whose sum is σ = 2097975600. Its totient is φ = 559460048.

The previous prime is 1158881639. The next prime is 1158881651. The reversal of 1158881644 is 4461888511.

It is a junction number, because it is equal to n+sod(n) for n = 1158881594 and 1158881603.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4995064 + ... + 4995295.

It is an arithmetic number, because the mean of its divisors is an integer number (174831300).

Almost surely, 2^1158881644 is an apocalyptic number.

It is an amenable number.

1158881644 is a deficient number, since it is larger than the sum of its proper divisors (939093956).

1158881644 is a wasteful number, since it uses less digits than its factorization.

1158881644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9990392 (or 9990390 counting only the distinct ones).

The product of its digits is 245760, while the sum is 46.

The square root of 1158881644 is about 34042.3507413927. The cubic root of 1158881644 is about 1050.3798003214.

The spelling of 1158881644 in words is "one billion, one hundred fifty-eight million, eight hundred eighty-one thousand, six hundred forty-four".