1544665601131 has 2 divisors, whose sum is σ = 1544665601132. Its totient is φ = 1544665601130.

The previous prime is 1544665601081. The next prime is 1544665601137. The reversal of 1544665601131 is 1311065664451.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (1311065664451) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1544665601131 - 2²³ = 1544657212523 is a prime.

It is a super-2 number, since 2×1544665601131² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1544665601137) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 772332800565 + 772332800566.

It is an arithmetic number, because the mean of its divisors is an integer number (772332800566).

Almost surely, 2^{1544665601131} is an apocalyptic number.

1544665601131 is a deficient number, since it is larger than the sum of its proper divisors (1).

1544665601131 is an equidigital number, since it uses as much as digits as its factorization.

1544665601131 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 259200, while the sum is 43.

The spelling of 1544665601131 in words is "one trillion, five hundred forty-four billion, six hundred sixty-five million, six hundred one thousand, one hundred thirty-one".