870646558602221 has 2 divisors, whose sum is σ = 870646558602222. Its totient is φ = 870646558602220.

The previous prime is 870646558602217. The next prime is 870646558602259. The reversal of 870646558602221 is 122206855646078.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 869790450684100 + 856107918121 = 29492210^2 + 925261^2 .

It is a cyclic number.

It is not a de Polignac number, because 870646558602221 - 2² = 870646558602217 is a prime.

It is a super-2 number, since 2×870646558602221² (a number of 31 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (870646558602721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 435323279301110 + 435323279301111.

It is an arithmetic number, because the mean of its divisors is an integer number (435323279301111).

Almost surely, 2^{870646558602221} is an apocalyptic number.

It is an amenable number.

870646558602221 is a deficient number, since it is larger than the sum of its proper divisors (1).

870646558602221 is an equidigital number, since it uses as much as digits as its factorization.

870646558602221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 77414400, while the sum is 62.

The spelling of 870646558602221 in words is "eight hundred seventy trillion, six hundred forty-six billion, five hundred fifty-eight million, six hundred two thousand, two hundred twenty-one".