154999149481871 has 2 divisors, whose sum is σ = 154999149481872. Its totient is φ = 154999149481870.

The previous prime is 154999149481849. The next prime is 154999149481901. The reversal of 154999149481871 is 178184941999451.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 154999149481871 - 2¹⁴ = 154999149465487 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (154999149481801) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77499574740935 + 77499574740936.

It is an arithmetic number, because the mean of its divisors is an integer number (77499574740936).

Almost surely, 2^{154999149481871} is an apocalyptic number.

154999149481871 is a deficient number, since it is larger than the sum of its proper divisors (1).

154999149481871 is an equidigital number, since it uses as much as digits as its factorization.

154999149481871 is an evil number, because the sum of its binary digits is even.

The product of its digits is 940584960, while the sum is 80.

The spelling of 154999149481871 in words is "one hundred fifty-four trillion, nine hundred ninety-nine billion, one hundred forty-nine million, four hundred eighty-one thousand, eight hundred seventy-one".