1153867661 has 8 divisors (see below), whose sum is σ = 1175459040. Its totient is φ = 1132344208.

The previous prime is 1153867651. The next prime is 1153867669. The reversal of 1153867661 is 1667683511.

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 1153867661 - 2¹⁴ = 1153851277 is a prime.

It is a super-2 number, since 2×1153867661² = 2662821158203221842, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1153867669) 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, 17975 + ... + 51291.

It is an arithmetic number, because the mean of its divisors is an integer number (146932380).

Almost surely, 2^1153867661 is an apocalyptic number.

It is an amenable number.

1153867661 is a deficient number, since it is larger than the sum of its proper divisors (21591379).

1153867661 is an equidigital number, since it uses as much as digits as its factorization.

1153867661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33963.

The product of its digits is 181440, while the sum is 44.

The square root of 1153867661 is about 33968.6275995955. The cubic root of 1153867661 is about 1048.8627629782.

The spelling of 1153867661 in words is "one billion, one hundred fifty-three million, eight hundred sixty-seven thousand, six hundred sixty-one".