870641175787381 has 2 divisors, whose sum is σ = 870641175787382. Its totient is φ = 870641175787380.

The previous prime is 870641175787367. The next prime is 870641175787457. The reversal of 870641175787381 is 183787571146078.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 462544209799281 + 408096965988100 = 21506841^2 + 20201410^2 .

It is a cyclic number.

It is not a de Polignac number, because 870641175787381 - 2¹⁵ = 870641175754613 is a prime.

It is a super-3 number, since 3×870641175787381³ (a number of 46 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (870641175781381) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 435320587893690 + 435320587893691.

It is an arithmetic number, because the mean of its divisors is an integer number (435320587893691).

Almost surely, 2^{870641175787381} is an apocalyptic number.

It is an amenable number.

870641175787381 is a deficient number, since it is larger than the sum of its proper divisors (1).

870641175787381 is an equidigital number, since it uses as much as digits as its factorization.

870641175787381 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 442552320, while the sum is 73.

The spelling of 870641175787381 in words is "eight hundred seventy trillion, six hundred forty-one billion, one hundred seventy-five million, seven hundred eighty-seven thousand, three hundred eighty-one".