523557883837 has 2 divisors, whose sum is σ = 523557883838. Its totient is φ = 523557883836.

The previous prime is 523557883789. The next prime is 523557883847. The reversal of 523557883837 is 738388755325.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 521892101241 + 1665782596 = 722421^2 + 40814^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-523557883837 is a prime.

It is a super-2 number, since 2×523557883837² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (523557883847) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 261778941918 + 261778941919.

It is an arithmetic number, because the mean of its divisors is an integer number (261778941919).

Almost surely, 2^523557883837 is an apocalyptic number.

It is an amenable number.

523557883837 is a deficient number, since it is larger than the sum of its proper divisors (1).

523557883837 is an equidigital number, since it uses as much as digits as its factorization.

523557883837 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 169344000, while the sum is 64.

The spelling of 523557883837 in words is "five hundred twenty-three billion, five hundred fifty-seven million, eight hundred eighty-three thousand, eight hundred thirty-seven".