1216280154773 has 2 divisors, whose sum is σ = 1216280154774. Its totient is φ = 1216280154772.

The previous prime is 1216280154767. The next prime is 1216280154779. The reversal of 1216280154773 is 3774510826121.

It is a balanced prime because it is at equal distance from previous prime (1216280154767) and next prime (1216280154779).

It can be written as a sum of positive squares in only one way, i.e., 1192514232529 + 23765922244 = 1092023^2 + 154162^2 .

It is a cyclic number.

It is not a de Polignac number, because 1216280154773 - 2⁶ = 1216280154709 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1216280154779) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 608140077386 + 608140077387.

It is an arithmetic number, because the mean of its divisors is an integer number (608140077387).

Almost surely, 2^{1216280154773} is an apocalyptic number.

It is an amenable number.

1216280154773 is a deficient number, since it is larger than the sum of its proper divisors (1).

1216280154773 is an equidigital number, since it uses as much as digits as its factorization.

1216280154773 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 564480, while the sum is 47.

The spelling of 1216280154773 in words is "one trillion, two hundred sixteen billion, two hundred eighty million, one hundred fifty-four thousand, seven hundred seventy-three".