1215555467741 has 2 divisors, whose sum is σ = 1215555467742. Its totient is φ = 1215555467740.

The previous prime is 1215555467647. The next prime is 1215555467747. The reversal of 1215555467741 is 1477645555121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1185857838841 + 29697628900 = 1088971^2 + 172330^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1215555467741 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1215555467747) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 607777733870 + 607777733871.

It is an arithmetic number, because the mean of its divisors is an integer number (607777733871).

Almost surely, 2^{1215555467741} is an apocalyptic number.

It is an amenable number.

1215555467741 is a deficient number, since it is larger than the sum of its proper divisors (1).

1215555467741 is an equidigital number, since it uses as much as digits as its factorization.

1215555467741 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5880000, while the sum is 53.

The spelling of 1215555467741 in words is "one trillion, two hundred fifteen billion, five hundred fifty-five million, four hundred sixty-seven thousand, seven hundred forty-one".