361778663 has 8 divisors (see below), whose sum is σ = 367417728. Its totient is φ = 356181624.

The previous prime is 361778633. The next prime is 361778671. The reversal of 361778663 is 366877163.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 361778663 - 2²⁰ = 360730087 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (361778603) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7070 + ... + 27812.

It is an arithmetic number, because the mean of its divisors is an integer number (45927216).

Almost surely, 2^361778663 is an apocalyptic number.

361778663 is a deficient number, since it is larger than the sum of its proper divisors (5639065).

361778663 is a wasteful number, since it uses less digits than its factorization.

361778663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21013.

The product of its digits is 762048, while the sum is 47.

The square root of 361778663 is about 19020.4800938357. The cubic root of 361778663 is about 712.5483134572.

The spelling of 361778663 in words is "three hundred sixty-one million, seven hundred seventy-eight thousand, six hundred sixty-three".