154146491987 has 2 divisors, whose sum is σ = 154146491988. Its totient is φ = 154146491986.

The previous prime is 154146491969. The next prime is 154146492001. The reversal of 154146491987 is 789194641451.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 154146491987 - 2¹⁴ = 154146475603 is a prime.

It is a super-2 number, since 2×154146491987² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (154146491957) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77073245993 + 77073245994.

It is an arithmetic number, because the mean of its divisors is an integer number (77073245994).

Almost surely, 2^154146491987 is an apocalyptic number.

154146491987 is a deficient number, since it is larger than the sum of its proper divisors (1).

154146491987 is an equidigital number, since it uses as much as digits as its factorization.

154146491987 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8709120, while the sum is 59.

The spelling of 154146491987 in words is "one hundred fifty-four billion, one hundred forty-six million, four hundred ninety-one thousand, nine hundred eighty-seven".