34121620205405 has 8 divisors (see below), whose sum is σ = 40963958313912. Its totient is φ = 27285286786048.

The previous prime is 34121620205399. The next prime is 34121620205417. The reversal of 34121620205405 is 50450202612143.

It can be written as a sum of positive squares in 4 ways, for example, as 9975275789956 + 24146344415449 = 3158366^2 + 4913893^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 34121620205405 - 2¹² = 34121620201309 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1501159784 + ... + 1501182513.

It is an arithmetic number, because the mean of its divisors is an integer number (5120494789239).

Almost surely, 2^{34121620205405} is an apocalyptic number.

It is an amenable number.

34121620205405 is a deficient number, since it is larger than the sum of its proper divisors (6842338108507).

34121620205405 is a wasteful number, since it uses less digits than its factorization.

34121620205405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3002344575.

The product of its (nonzero) digits is 57600, while the sum is 35.

Adding to 34121620205405 its reverse (50450202612143), we get a palindrome (84571822817548).

The spelling of 34121620205405 in words is "thirty-four trillion, one hundred twenty-one billion, six hundred twenty million, two hundred five thousand, four hundred five".