1145615556 has 24 divisors (see below), whose sum is σ = 2789325504. Its totient is φ = 365268640.

The previous prime is 1145615539. The next prime is 1145615593. The reversal of 1145615556 is 6555165411.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2075115 + ... + 2075666.

It is an arithmetic number, because the mean of its divisors is an integer number (116221896).

Almost surely, 2^1145615556 is an apocalyptic number.

It is an amenable number.

1145615556 is an abundant number, since it is smaller than the sum of its proper divisors (1643709948).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1145615556 is a wasteful number, since it uses less digits than its factorization.

1145615556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4150811 (or 4150809 counting only the distinct ones).

The product of its digits is 90000, while the sum is 39.

The square root of 1145615556 is about 33846.9430820569. The cubic root of 1145615556 is about 1046.3563977275.

The spelling of 1145615556 in words is "one billion, one hundred forty-five million, six hundred fifteen thousand, five hundred fifty-six".