854702161561 has 2 divisors, whose sum is σ = 854702161562. Its totient is φ = 854702161560.

The previous prime is 854702161553. The next prime is 854702161589. The reversal of 854702161561 is 165161207458.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 854618895936 + 83265625 = 924456^2 + 9125^2 .

It is a cyclic number.

It is not a de Polignac number, because 854702161561 - 2³ = 854702161553 is a prime.

It is not a weakly prime, because it can be changed into another prime (854702161961) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 427351080780 + 427351080781.

It is an arithmetic number, because the mean of its divisors is an integer number (427351080781).

Almost surely, 2^854702161561 is an apocalyptic number.

It is an amenable number.

854702161561 is a deficient number, since it is larger than the sum of its proper divisors (1).

854702161561 is an equidigital number, since it uses as much as digits as its factorization.

854702161561 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 403200, while the sum is 46.

The spelling of 854702161561 in words is "eight hundred fifty-four billion, seven hundred two million, one hundred sixty-one thousand, five hundred sixty-one".