1361481644 has 6 divisors (see below), whose sum is σ = 2382592884. Its totient is φ = 680740820.

The previous prime is 1361481643. The next prime is 1361481661. The reversal of 1361481644 is 4461841631.

It is a junction number, because it is equal to n+sod(n) for n = 1361481598 and 1361481607.

It is not an unprimeable number, because it can be changed into a prime (1361481643) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 170185202 + ... + 170185209.

It is an arithmetic number, because the mean of its divisors is an integer number (397098814).

Almost surely, 2^1361481644 is an apocalyptic number.

It is an amenable number.

1361481644 is a deficient number, since it is larger than the sum of its proper divisors (1021111240).

1361481644 is a wasteful number, since it uses less digits than its factorization.

1361481644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 340370415 (or 340370413 counting only the distinct ones).

The product of its digits is 55296, while the sum is 38.

The square root of 1361481644 is about 36898.2607178170. The cubic root of 1361481644 is about 1108.3338485359. Note that the first 3 decimals are identical.

The spelling of 1361481644 in words is "one billion, three hundred sixty-one million, four hundred eighty-one thousand, six hundred forty-four".