102202405015405 has 4 divisors (see below), whose sum is σ = 122642886018492. Its totient is φ = 81761924012320.

The previous prime is 102202405015393. The next prime is 102202405015471. The reversal of 102202405015405 is 504510504202201.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 79946023092516 + 22256381922889 = 8941254^2 + 4717667^2 .

It is not a de Polignac number, because 102202405015405 - 2¹⁵ = 102202404982637 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10220240501536 + ... + 10220240501545.

It is an arithmetic number, because the mean of its divisors is an integer number (30660721504623).

Almost surely, 2^{102202405015405} is an apocalyptic number.

It is an amenable number.

102202405015405 is a deficient number, since it is larger than the sum of its proper divisors (20440481003087).

102202405015405 is an equidigital number, since it uses as much as digits as its factorization.

102202405015405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20440481003086.

The product of its (nonzero) digits is 16000, while the sum is 31.

Adding to 102202405015405 its reverse (504510504202201), we get a palindrome (606712909217606).

The spelling of 102202405015405 in words is "one hundred two trillion, two hundred two billion, four hundred five million, fifteen thousand, four hundred five".