1154521170655 has 4 divisors (see below), whose sum is σ = 1385425404792. Its totient is φ = 923616936520.

The previous prime is 1154521170611. The next prime is 1154521170659. The reversal of 1154521170655 is 5560711254511.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 1154521170655 - 2¹⁷ = 1154521039583 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 (1154521170659) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 115452117061 + ... + 115452117070.

It is an arithmetic number, because the mean of its divisors is an integer number (346356351198).

Almost surely, 2^{1154521170655} is an apocalyptic number.

1154521170655 is a deficient number, since it is larger than the sum of its proper divisors (230904234137).

1154521170655 is an equidigital number, since it uses as much as digits as its factorization.

1154521170655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 230904234136.

The product of its (nonzero) digits is 210000, while the sum is 43.

The spelling of 1154521170655 in words is "one trillion, one hundred fifty-four billion, five hundred twenty-one million, one hundred seventy thousand, six hundred fifty-five".