1153640155 has 8 divisors (see below), whose sum is σ = 1432105200. Its totient is φ = 891087456.

The previous prime is 1153640153. The next prime is 1153640167. The reversal of 1153640155 is 5510463511.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1153640155 - 2¹ = 1153640153 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1153640153) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3977925 + ... + 3978214.

It is an arithmetic number, because the mean of its divisors is an integer number (179013150).

Almost surely, 2^1153640155 is an apocalyptic number.

1153640155 is a deficient number, since it is larger than the sum of its proper divisors (278465045).

1153640155 is an equidigital number, since it uses as much as digits as its factorization.

1153640155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7956173.

The product of its (nonzero) digits is 9000, while the sum is 31.

The square root of 1153640155 is about 33965.2786680751. The cubic root of 1153640155 is about 1048.7938243225.

The spelling of 1153640155 in words is "one billion, one hundred fifty-three million, six hundred forty thousand, one hundred fifty-five".