1231153606673 has 4 divisors (see below), whose sum is σ = 1231601464500. Its totient is φ = 1230705748848.

The previous prime is 1231153606633. The next prime is 1231153606691. The reversal of 1231153606673 is 3766063511321.

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

It can be written as a sum of positive squares in 2 ways, for example, as 209574430849 + 1021579175824 = 457793^2 + 1010732^2 .

It is a cyclic number.

It is not a de Polignac number, because 1231153606673 - 2³⁴ = 1213973737489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1231153606603) 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, 223924790 + ... + 223930287.

It is an arithmetic number, because the mean of its divisors is an integer number (307900366125).

Almost surely, 2^{1231153606673} is an apocalyptic number.

It is an amenable number.

1231153606673 is a deficient number, since it is larger than the sum of its proper divisors (447857827).

1231153606673 is an equidigital number, since it uses as much as digits as its factorization.

1231153606673 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 447857826.

The product of its (nonzero) digits is 408240, while the sum is 44.

The spelling of 1231153606673 in words is "one trillion, two hundred thirty-one billion, one hundred fifty-three million, six hundred six thousand, six hundred seventy-three".