163587082681 has 27 divisors (see below), whose sum is σ = 182414858437. Its totient is φ = 146592119960.

The previous prime is 163587082667. The next prime is 163587082699. The reversal of 163587082681 is 186280785361.

The square root of 163587082681 is 404459.

It is a perfect power (a square), and thus also a powerful number.

It is not a de Polignac number, because 163587082681 - 2¹³ = 163587074489 is a prime.

It is a super-2 number, since 2×163587082681² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (163587082601) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 369270846 + ... + 369271288.

Almost surely, 2^163587082681 is an apocalyptic number.

163587082681 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

163587082681 is the 404459-th square number.

163587082681 is the 202230-th centered octagonal number.

It is an amenable number.

163587082681 is a deficient number, since it is larger than the sum of its proper divisors (18827775756).

163587082681 is an frugal number, since it uses more digits than its factorization.

163587082681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1074 (or 537 counting only the distinct ones).

The product of its (nonzero) digits is 3870720, while the sum is 55.

The spelling of 163587082681 in words is "one hundred sixty-three billion, five hundred eighty-seven million, eighty-two thousand, six hundred eighty-one".