1154655323261 has 4 divisors (see below), whose sum is σ = 1259623989024. Its totient is φ = 1049686657500.

The previous prime is 1154655323209. The next prime is 1154655323281. The reversal of 1154655323261 is 1623235564511.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1154655323261 - 2²² = 1154651128957 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1154655323281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 52484332865 + ... + 52484332886.

It is an arithmetic number, because the mean of its divisors is an integer number (314905997256).

Almost surely, 2^{1154655323261} is an apocalyptic number.

1154655323261 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1154655323261 is a deficient number, since it is larger than the sum of its proper divisors (104968665763).

1154655323261 is a wasteful number, since it uses less digits than its factorization.

1154655323261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104968665762.

The product of its digits is 648000, while the sum is 44.

The spelling of 1154655323261 in words is "one trillion, one hundred fifty-four billion, six hundred fifty-five million, three hundred twenty-three thousand, two hundred sixty-one".