87646532537 has 2 divisors, whose sum is σ = 87646532538. Its totient is φ = 87646532536.

The previous prime is 87646532513. The next prime is 87646532539. The reversal of 87646532537 is 73523564678.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 70400539561 + 17245992976 = 265331^2 + 131324^2 .

It is a cyclic number.

It is not a de Polignac number, because 87646532537 - 2⁶ = 87646532473 is a prime.

It is a super-3 number, since 3×87646532537³ (a number of 34 digits) contains 333 as substring.

Together with 87646532539, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (87646532539) 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 as a sum of consecutive naturals, namely, 43823266268 + 43823266269.

It is an arithmetic number, because the mean of its divisors is an integer number (43823266269).

Almost surely, 2^87646532537 is an apocalyptic number.

It is an amenable number.

87646532537 is a deficient number, since it is larger than the sum of its proper divisors (1).

87646532537 is an equidigital number, since it uses as much as digits as its factorization.

87646532537 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 25401600, while the sum is 56.

The spelling of 87646532537 in words is "eighty-seven billion, six hundred forty-six million, five hundred thirty-two thousand, five hundred thirty-seven".