102618356281 has 9 divisors (see below), whose sum is σ = 119374982181. Its totient is φ = 87956669052.

The previous prime is 102618356279. The next prime is 102618356363. The reversal of 102618356281 is 182653816201.

The square root of 102618356281 is 320341.

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

It is not a de Polignac number, because 102618356281 - 2¹ = 102618356279 is a prime.

It is a super-2 number, since 2×102618356281² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (102618356221) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 2219506 + ... + 2265268.

It is an arithmetic number, because the mean of its divisors is an integer number (13263886909).

Almost surely, 2^102618356281 is an apocalyptic number.

102618356281 is the 320341-st square number.

102618356281 is the 160171-st centered octagonal number.

It is an amenable number.

102618356281 is a deficient number, since it is larger than the sum of its proper divisors (16756625900).

102618356281 is an frugal number, since it uses more digits than its factorization.

102618356281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91540 (or 45770 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 43.

The spelling of 102618356281 in words is "one hundred two billion, six hundred eighteen million, three hundred fifty-six thousand, two hundred eighty-one".