234552721545 has 64 divisors (see below), whose sum is σ = 435332620800. Its totient is φ = 119595294720.

The previous prime is 234552721537. The next prime is 234552721547. The reversal of 234552721545 is 545127255432.

It is a happy number.

234552721545 is a `hidden beast` number, since 2 + 34 + 5 + 5 + 2 + 72 + 1 + 545 = 666.

It is not a de Polignac number, because 234552721545 - 2³ = 234552721537 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 234552721545.

It is not an unprimeable number, because it can be changed into a prime (234552721547) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 6468265 + ... + 6504425.

It is an arithmetic number, because the mean of its divisors is an integer number (6802072200).

Almost surely, 2^234552721545 is an apocalyptic number.

It is an amenable number.

234552721545 is a deficient number, since it is larger than the sum of its proper divisors (200779899255).

234552721545 is a wasteful number, since it uses less digits than its factorization.

234552721545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38287 (or 38281 counting only the distinct ones).

The product of its digits is 1680000, while the sum is 45.

Adding to 234552721545 its reverse (545127255432), we get a palindrome (779679976977).

The spelling of 234552721545 in words is "two hundred thirty-four billion, five hundred fifty-two million, seven hundred twenty-one thousand, five hundred forty-five".