145649089601 has 2 divisors, whose sum is σ = 145649089602. Its totient is φ = 145649089600.

The previous prime is 145649089567. The next prime is 145649089669. The reversal of 145649089601 is 106980946541.

It is a Cunningham number, because it is equal to 381640²+1.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 145649089600 + 1 = 381640^2 + 1^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-145649089601 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (145649080601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72824544800 + 72824544801.

It is an arithmetic number, because the mean of its divisors is an integer number (72824544801).

Almost surely, 2^145649089601 is an apocalyptic number.

It is an amenable number.

145649089601 is a deficient number, since it is larger than the sum of its proper divisors (1).

145649089601 is an equidigital number, since it uses as much as digits as its factorization.

145649089601 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1866240, while the sum is 53.

The spelling of 145649089601 in words is "one hundred forty-five billion, six hundred forty-nine million, eighty-nine thousand, six hundred one".