361908666643 has 4 divisors (see below), whose sum is σ = 363803476608. Its totient is φ = 360013856680.

The previous prime is 361908666641. The next prime is 361908666667. The reversal of 361908666643 is 346666809163.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 346666809163 = 49223 ⋅7042781.

It is a cyclic number.

It is not a de Polignac number, because 361908666643 - 2¹ = 361908666641 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (361908666641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 947404696 + ... + 947405077.

It is an arithmetic number, because the mean of its divisors is an integer number (90950869152).

Almost surely, 2^361908666643 is an apocalyptic number.

361908666643 is a deficient number, since it is larger than the sum of its proper divisors (1894809965).

361908666643 is a wasteful number, since it uses less digits than its factorization.

361908666643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1894809964.

The product of its (nonzero) digits is 20155392, while the sum is 58.

The spelling of 361908666643 in words is "three hundred sixty-one billion, nine hundred eight million, six hundred sixty-six thousand, six hundred forty-three".