3661355656363 has 4 divisors (see below), whose sum is σ = 3876729518520. Its totient is φ = 3445981794208.

The previous prime is 3661355656327. The next prime is 3661355656421. The reversal of 3661355656363 is 3636565531663.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 3661355656363 - 2²¹ = 3661353559211 is a prime.

It is a Smith number, since the sum of its digits (58) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3661355656298 and 3661355656307.

It is not an unprimeable number, because it can be changed into a prime (3661355656313) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 107686931053 + ... + 107686931086.

It is an arithmetic number, because the mean of its divisors is an integer number (969182379630).

Almost surely, 2^{3661355656363} is an apocalyptic number.

3661355656363 is a deficient number, since it is larger than the sum of its proper divisors (215373862157).

3661355656363 is a wasteful number, since it uses less digits than its factorization.

3661355656363 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 215373862156.

The product of its digits is 78732000, while the sum is 58.

The spelling of 3661355656363 in words is "three trillion, six hundred sixty-one billion, three hundred fifty-five million, six hundred fifty-six thousand, three hundred sixty-three".