1373648180621 has 2 divisors, whose sum is σ = 1373648180622. Its totient is φ = 1373648180620.

The previous prime is 1373648180603. The next prime is 1373648180629. The reversal of 1373648180621 is 1260818463731.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1364889841225 + 8758339396 = 1168285^2 + 93586^2 .

It is a cyclic number.

It is not a de Polignac number, because 1373648180621 - 2¹⁸ = 1373647918477 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1373648180621.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1373648180629) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 686824090310 + 686824090311.

It is an arithmetic number, because the mean of its divisors is an integer number (686824090311).

Almost surely, 2^{1373648180621} is an apocalyptic number.

It is an amenable number.

1373648180621 is a deficient number, since it is larger than the sum of its proper divisors (1).

1373648180621 is an equidigital number, since it uses as much as digits as its factorization.

1373648180621 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1161216, while the sum is 50.

The spelling of 1373648180621 in words is "one trillion, three hundred seventy-three billion, six hundred forty-eight million, one hundred eighty thousand, six hundred twenty-one".