84477367122581 has 2 divisors, whose sum is σ = 84477367122582. Its totient is φ = 84477367122580.

The previous prime is 84477367122559. The next prime is 84477367122619. The reversal of 84477367122581 is 18522176377448.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 53090021964100 + 31387345158481 = 7286290^2 + 5602441^2 .

It is a cyclic number.

It is not a de Polignac number, because 84477367122581 - 2¹⁰ = 84477367121557 is a prime.

It is a super-2 number, since 2×84477367122581² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (84477367125581) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42238683561290 + 42238683561291.

It is an arithmetic number, because the mean of its divisors is an integer number (42238683561291).

Almost surely, 2^{84477367122581} is an apocalyptic number.

It is an amenable number.

84477367122581 is a deficient number, since it is larger than the sum of its proper divisors (1).

84477367122581 is an equidigital number, since it uses as much as digits as its factorization.

84477367122581 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 126443520, while the sum is 65.

The spelling of 84477367122581 in words is "eighty-four trillion, four hundred seventy-seven billion, three hundred sixty-seven million, one hundred twenty-two thousand, five hundred eighty-one".