145893450649 has 4 divisors (see below), whose sum is σ = 145930028580. Its totient is φ = 145856872720.

The previous prime is 145893450617. The next prime is 145893450671. The reversal of 145893450649 is 946054398541.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 35607690000 + 110285760649 = 188700^2 + 332093^2 .

It is a cyclic number.

It is not a de Polignac number, because 145893450649 - 2⁵ = 145893450617 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 145893450593 and 145893450602.

It is not an unprimeable number, because it can be changed into a prime (145893450049) 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 in 3 ways as a sum of consecutive naturals, for example, 18282982 + ... + 18290959.

It is an arithmetic number, because the mean of its divisors is an integer number (36482507145).

Almost surely, 2^145893450649 is an apocalyptic number.

It is an amenable number.

145893450649 is a deficient number, since it is larger than the sum of its proper divisors (36577931).

145893450649 is an equidigital number, since it uses as much as digits as its factorization.

145893450649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36577930.

The product of its (nonzero) digits is 18662400, while the sum is 58.

The spelling of 145893450649 in words is "one hundred forty-five billion, eight hundred ninety-three million, four hundred fifty thousand, six hundred forty-nine".