361648821 has 16 divisors (see below), whose sum is σ = 514920960. Its totient is φ = 225274560.

The previous prime is 361648801. The next prime is 361648873. The reversal of 361648821 is 128846163.

It is a de Polignac number, because none of the positive numbers 2^k-361648821 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 361648821.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (361648801) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 64350 + ... + 69743.

It is an arithmetic number, because the mean of its divisors is an integer number (32182560).

Almost surely, 2^361648821 is an apocalyptic number.

361648821 is a gapful number since it is divisible by the number (31) formed by its first and last digit.

It is an amenable number.

361648821 is a deficient number, since it is larger than the sum of its proper divisors (153272139).

361648821 is a wasteful number, since it uses less digits than its factorization.

361648821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134156.

The product of its digits is 55296, while the sum is 39.

The square root of 361648821 is about 19017.0665718980. The cubic root of 361648821 is about 712.4630589650.

The spelling of 361648821 in words is "three hundred sixty-one million, six hundred forty-eight thousand, eight hundred twenty-one".