23155143135444 has 18 divisors (see below), whose sum is σ = 58531056259130. Its totient is φ = 7718381045136.

The previous prime is 23155143135431. The next prime is 23155143135451. The reversal of 23155143135444 is 44453134155132.

23155143135444 is a `hidden beast` number, since 2 + 3 + 1 + 5 + 51 + 43 + 13 + 544 + 4 = 666.

It can be written as a sum of positive squares in only one way, i.e., 22404961958544 + 750181176900 = 4733388^2 + 866130^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a self number, because there is not a number n which added to its sum of digits gives 23155143135444.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 321599210179 + ... + 321599210250.

Almost surely, 2^{23155143135444} is an apocalyptic number.

It is an amenable number.

23155143135444 is an abundant number, since it is smaller than the sum of its proper divisors (35375913123686).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

23155143135444 is a wasteful number, since it uses less digits than its factorization.

23155143135444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 643198420439 (or 643198420434 counting only the distinct ones).

The product of its digits is 1728000, while the sum is 45.

The spelling of 23155143135444 in words is "twenty-three trillion, one hundred fifty-five billion, one hundred forty-three million, one hundred thirty-five thousand, four hundred forty-four".