3661320356615 has 4 divisors (see below), whose sum is σ = 4393584427944. Its totient is φ = 2929056285288.

The previous prime is 3661320356567. The next prime is 3661320356647. The reversal of 3661320356615 is 5166530231663.

3661320356615 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 3661320356615 - 2²⁴ = 3661303579399 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 3661320356615.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 366132035657 + ... + 366132035666.

It is an arithmetic number, because the mean of its divisors is an integer number (1098396106986).

Almost surely, 2^{3661320356615} is an apocalyptic number.

3661320356615 is a deficient number, since it is larger than the sum of its proper divisors (732264071329).

3661320356615 is an equidigital number, since it uses as much as digits as its factorization.

3661320356615 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 732264071328.

The product of its (nonzero) digits is 1749600, while the sum is 47.

The spelling of 3661320356615 in words is "three trillion, six hundred sixty-one billion, three hundred twenty million, three hundred fifty-six thousand, six hundred fifteen".