1153213656 has 64 divisors (see below), whose sum is σ = 3298195200. Its totient is φ = 329159808.

The previous prime is 1153213651. The next prime is 1153213771. The reversal of 1153213656 is 6563123511.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1153213651) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 200955 + ... + 206613.

It is an arithmetic number, because the mean of its divisors is an integer number (51534300).

Almost surely, 2^1153213656 is an apocalyptic number.

It is an amenable number.

1153213656 is an abundant number, since it is smaller than the sum of its proper divisors (2144981544).

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

1153213656 is a wasteful number, since it uses less digits than its factorization.

1153213656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6888 (or 6884 counting only the distinct ones).

The product of its digits is 16200, while the sum is 33.

The square root of 1153213656 is about 33958.9996319091. Note that the first 3 decimals coincide. The cubic root of 1153213656 is about 1048.6645625679.

The spelling of 1153213656 in words is "one billion, one hundred fifty-three million, two hundred thirteen thousand, six hundred fifty-six".