252591813543 has 4 divisors (see below), whose sum is σ = 336789084728. Its totient is φ = 168394542360.

The previous prime is 252591813491. The next prime is 252591813553. The reversal of 252591813543 is 345318195252.

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

It is not a de Polignac number, because 252591813543 - 2¹³ = 252591805351 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 252591813492 and 252591813501.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (252591813553) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 42098635588 + ... + 42098635593.

It is an arithmetic number, because the mean of its divisors is an integer number (84197271182).

Almost surely, 2^252591813543 is an apocalyptic number.

252591813543 is a deficient number, since it is larger than the sum of its proper divisors (84197271185).

252591813543 is an equidigital number, since it uses as much as digits as its factorization.

252591813543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84197271184.

The product of its digits is 1296000, while the sum is 48.

The spelling of 252591813543 in words is "two hundred fifty-two billion, five hundred ninety-one million, eight hundred thirteen thousand, five hundred forty-three".