145661325977 has 2 divisors, whose sum is σ = 145661325978. Its totient is φ = 145661325976.

The previous prime is 145661325973. The next prime is 145661326087. The reversal of 145661325977 is 779523166541.

145661325977 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 143602344601 + 2058981376 = 378949^2 + 45376^2 .

It is a cyclic number.

It is not a de Polignac number, because 145661325977 - 2² = 145661325973 is a prime.

It is not a weakly prime, because it can be changed into another prime (145661325973) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72830662988 + 72830662989.

It is an arithmetic number, because the mean of its divisors is an integer number (72830662989).

Almost surely, 2^145661325977 is an apocalyptic number.

It is an amenable number.

145661325977 is a deficient number, since it is larger than the sum of its proper divisors (1).

145661325977 is an equidigital number, since it uses as much as digits as its factorization.

145661325977 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9525600, while the sum is 56.

The spelling of 145661325977 in words is "one hundred forty-five billion, six hundred sixty-one million, three hundred twenty-five thousand, nine hundred seventy-seven".