52542478789 has 4 divisors (see below), whose sum is σ = 52590817024. Its totient is φ = 52494140556.

The previous prime is 52542478753. The next prime is 52542478811. The reversal of 52542478789 is 98787424525.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 52542478789 - 2¹⁹ = 52541954501 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (52542470789) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24167487 + ... + 24169660.

It is an arithmetic number, because the mean of its divisors is an integer number (13147704256).

Almost surely, 2^52542478789 is an apocalyptic number.

It is an amenable number.

52542478789 is a deficient number, since it is larger than the sum of its proper divisors (48338235).

52542478789 is a wasteful number, since it uses less digits than its factorization.

52542478789 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48338234.

The product of its digits is 45158400, while the sum is 61.

The spelling of 52542478789 in words is "fifty-two billion, five hundred forty-two million, four hundred seventy-eight thousand, seven hundred eighty-nine".