1154632661 has 16 divisors (see below), whose sum is σ = 1427059200. Its totient is φ = 909715968.

The previous prime is 1154632649. The next prime is 1154632663. The reversal of 1154632661 is 1662364511.

It is not a de Polignac number, because 1154632661 - 2¹⁰ = 1154631637 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1154632663) 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, 4796 + ... + 48293.

It is an arithmetic number, because the mean of its divisors is an integer number (89191200).

Almost surely, 2^1154632661 is an apocalyptic number.

It is an amenable number.

1154632661 is a deficient number, since it is larger than the sum of its proper divisors (272426539).

1154632661 is a wasteful number, since it uses less digits than its factorization.

1154632661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53348.

The product of its digits is 25920, while the sum is 35.

The square root of 1154632661 is about 33979.8861239999. The cubic root of 1154632661 is about 1049.0945061216.

The spelling of 1154632661 in words is "one billion, one hundred fifty-four million, six hundred thirty-two thousand, six hundred sixty-one".