634409523541 has 2 divisors, whose sum is σ = 634409523542. Its totient is φ = 634409523540.

The previous prime is 634409523493. The next prime is 634409523547. The reversal of 634409523541 is 145325904436.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 548821680625 + 85587842916 = 740825^2 + 292554^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-634409523541 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 634409523491 and 634409523500.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (634409523547) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 317204761770 + 317204761771.

It is an arithmetic number, because the mean of its divisors is an integer number (317204761771).

Almost surely, 2^634409523541 is an apocalyptic number.

It is an amenable number.

634409523541 is a deficient number, since it is larger than the sum of its proper divisors (1).

634409523541 is an equidigital number, since it uses as much as digits as its factorization.

634409523541 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1555200, while the sum is 46.

It can be divided in two parts, 6344095 and 23541, that added together give a palindrome (6367636).

The spelling of 634409523541 in words is "six hundred thirty-four billion, four hundred nine million, five hundred twenty-three thousand, five hundred forty-one".