3661494326947 has 2 divisors, whose sum is σ = 3661494326948. Its totient is φ = 3661494326946.

The previous prime is 3661494326939. The next prime is 3661494326977. The reversal of 3661494326947 is 7496234941663.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 3661494326947 - 2³ = 3661494326939 is a prime.

It is not a weakly prime, because it can be changed into another prime (3661494326977) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1830747163473 + 1830747163474.

It is an arithmetic number, because the mean of its divisors is an integer number (1830747163474).

Almost surely, 2^{3661494326947} is an apocalyptic number.

3661494326947 is a deficient number, since it is larger than the sum of its proper divisors (1).

3661494326947 is an equidigital number, since it uses as much as digits as its factorization.

3661494326947 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 141087744, while the sum is 64.

The spelling of 3661494326947 in words is "three trillion, six hundred sixty-one billion, four hundred ninety-four million, three hundred twenty-six thousand, nine hundred forty-seven".