87856509806371 has 2 divisors, whose sum is σ = 87856509806372. Its totient is φ = 87856509806370.

The previous prime is 87856509806297. The next prime is 87856509806413. The reversal of 87856509806371 is 17360890565878.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 87856509806371 - 2⁹ = 87856509805859 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 87856509806294 and 87856509806303.

It is not a weakly prime, because it can be changed into another prime (87856509806171) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43928254903185 + 43928254903186.

It is an arithmetic number, because the mean of its divisors is an integer number (43928254903186).

Almost surely, 2^{87856509806371} is an apocalyptic number.

87856509806371 is a deficient number, since it is larger than the sum of its proper divisors (1).

87856509806371 is an equidigital number, since it uses as much as digits as its factorization.

87856509806371 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 609638400, while the sum is 73.

The spelling of 87856509806371 in words is "eighty-seven trillion, eight hundred fifty-six billion, five hundred nine million, eight hundred six thousand, three hundred seventy-one".