102805485554 has 8 divisors (see below), whose sum is σ = 155572903260. Its totient is φ = 50947851136.

The previous prime is 102805485553. The next prime is 102805485557. The reversal of 102805485554 is 455584508201.

It can be written as a sum of positive squares in 2 ways, for example, as 102353285329 + 452200225 = 319927^2 + 21265^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 102805485499 and 102805485508.

It is not an unprimeable number, because it can be changed into a prime (102805485553) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 227445539 + ... + 227445990.

Almost surely, 2^102805485554 is an apocalyptic number.

102805485554 is a deficient number, since it is larger than the sum of its proper divisors (52767417706).

102805485554 is a wasteful number, since it uses less digits than its factorization.

102805485554 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 454891644.

The product of its (nonzero) digits is 1280000, while the sum is 47.

The spelling of 102805485554 in words is "one hundred two billion, eight hundred five million, four hundred eighty-five thousand, five hundred fifty-four".