1724423745551 has 4 divisors (see below), whose sum is σ = 1857071725992. Its totient is φ = 1591775765112.

The previous prime is 1724423745523. The next prime is 1724423745559. The reversal of 1724423745551 is 1555473244271.

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

It is a de Polignac number, because none of the positive numbers 2^k-1724423745551 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1724423745551.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1724423745559) 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, 66323990201 + ... + 66323990226.

It is an arithmetic number, because the mean of its divisors is an integer number (464267931498).

Almost surely, 2^{1724423745551} is an apocalyptic number.

1724423745551 is a deficient number, since it is larger than the sum of its proper divisors (132647980441).

1724423745551 is a wasteful number, since it uses less digits than its factorization.

1724423745551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 132647980440.

The product of its digits is 4704000, while the sum is 50.

The spelling of 1724423745551 in words is "one trillion, seven hundred twenty-four billion, four hundred twenty-three million, seven hundred forty-five thousand, five hundred fifty-one".