361778664 has 64 divisors (see below), whose sum is σ = 976429440. Its totient is φ = 111041280.

The previous prime is 361778633. The next prime is 361778671. The reversal of 361778664 is 466877163.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 150754 + ... + 153134.

It is an arithmetic number, because the mean of its divisors is an integer number (15256710).

Almost surely, 2^361778664 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 361778664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (488214720).

361778664 is an abundant number, since it is smaller than the sum of its proper divisors (614650776).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

361778664 is a wasteful number, since it uses less digits than its factorization.

361778664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2890 (or 2886 counting only the distinct ones).

The product of its digits is 1016064, while the sum is 48.

The square root of 361778664 is about 19020.4801201232. The cubic root of 361778664 is about 712.5483141137.

The spelling of 361778664 in words is "three hundred sixty-one million, seven hundred seventy-eight thousand, six hundred sixty-four".