375216644 has 18 divisors (see below), whose sum is σ = 721750302. Its totient is φ = 170552800.

The previous prime is 375216643. The next prime is 375216649. The reversal of 375216644 is 446612573.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 374809600 + 407044 = 19360^2 + 638^2 .

It is a junction number, because it is equal to n+sod(n) for n = 375216598 and 375216607.

It is not an unprimeable number, because it can be changed into a prime (375216643) 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 5 ways as a sum of consecutive naturals, for example, 387137 + ... + 388104.

It is an arithmetic number, because the mean of its divisors is an integer number (40097239).

Almost surely, 2^375216644 is an apocalyptic number.

It is an amenable number.

375216644 is a deficient number, since it is larger than the sum of its proper divisors (346533658).

375216644 is a wasteful number, since it uses less digits than its factorization.

375216644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 775267 (or 775254 counting only the distinct ones).

The product of its digits is 120960, while the sum is 38.

The square root of 375216644 is about 19370.5096473996. The cubic root of 375216644 is about 721.2636271826.

The spelling of 375216644 in words is "three hundred seventy-five million, two hundred sixteen thousand, six hundred forty-four".