1455661136261 has 2 divisors, whose sum is σ = 1455661136262. Its totient is φ = 1455661136260.

The previous prime is 1455661136249. The next prime is 1455661136299. The reversal of 1455661136261 is 1626311665541.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1448231730625 + 7429405636 = 1203425^2 + 86194^2 .

It is a cyclic number.

It is not a de Polignac number, because 1455661136261 - 2³⁰ = 1454587394437 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1455661136201) 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, 727830568130 + 727830568131.

It is an arithmetic number, because the mean of its divisors is an integer number (727830568131).

Almost surely, 2^{1455661136261} is an apocalyptic number.

It is an amenable number.

1455661136261 is a deficient number, since it is larger than the sum of its proper divisors (1).

1455661136261 is an equidigital number, since it uses as much as digits as its factorization.

1455661136261 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 777600, while the sum is 47.

The spelling of 1455661136261 in words is "one trillion, four hundred fifty-five billion, six hundred sixty-one million, one hundred thirty-six thousand, two hundred sixty-one".