3629447505661 has 2 divisors, whose sum is σ = 3629447505662. Its totient is φ = 3629447505660.

The previous prime is 3629447505647. The next prime is 3629447505737. The reversal of 3629447505661 is 1665057449263.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2958637364761 + 670810140900 = 1720069^2 + 819030^2 .

It is a cyclic number.

It is not a de Polignac number, because 3629447505661 - 2¹³ = 3629447497469 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 3629447505596 and 3629447505605.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3629447505611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1814723752830 + 1814723752831.

It is an arithmetic number, because the mean of its divisors is an integer number (1814723752831).

Almost surely, 2^{3629447505661} is an apocalyptic number.

It is an amenable number.

3629447505661 is a deficient number, since it is larger than the sum of its proper divisors (1).

3629447505661 is an equidigital number, since it uses as much as digits as its factorization.

3629447505661 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 32659200, while the sum is 58.

The spelling of 3629447505661 in words is "three trillion, six hundred twenty-nine billion, four hundred forty-seven million, five hundred five thousand, six hundred sixty-one".