634432104162121 has 4 divisors (see below), whose sum is σ = 635649824132244. Its totient is φ = 633214384192000.

The previous prime is 634432104162019. The next prime is 634432104162179. The reversal of 634432104162121 is 121261401234436.

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 234727249697721 + 399704854464400 = 15320811^2 + 19992620^2 .

It is a cyclic number.

It is not a de Polignac number, because 634432104162121 - 2³¹ = 634429956678473 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (634432104162821) 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, 608859984280 + ... + 608859985321.

It is an arithmetic number, because the mean of its divisors is an integer number (158912456033061).

Almost surely, 2^{634432104162121} is an apocalyptic number.

It is an amenable number.

634432104162121 is a deficient number, since it is larger than the sum of its proper divisors (1217719970123).

634432104162121 is a wasteful number, since it uses less digits than its factorization.

634432104162121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1217719970122.

The product of its (nonzero) digits is 165888, while the sum is 40.

Adding to 634432104162121 its reverse (121261401234436), we get a palindrome (755693505396557).

The spelling of 634432104162121 in words is "six hundred thirty-four trillion, four hundred thirty-two billion, one hundred four million, one hundred sixty-two thousand, one hundred twenty-one".