399901028480377 has 2 divisors, whose sum is σ = 399901028480378. Its totient is φ = 399901028480376.

The previous prime is 399901028480297. The next prime is 399901028480399. The reversal of 399901028480377 is 773084820109993.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 357422127283321 + 42478901197056 = 18905611^2 + 6517584^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-399901028480377 is a prime.

It is not a weakly prime, because it can be changed into another prime (399901028480477) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 199950514240188 + 199950514240189.

It is an arithmetic number, because the mean of its divisors is an integer number (199950514240189).

Almost surely, 2^{399901028480377} is an apocalyptic number.

It is an amenable number.

399901028480377 is a deficient number, since it is larger than the sum of its proper divisors (1).

399901028480377 is an equidigital number, since it uses as much as digits as its factorization.

399901028480377 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 164602368, while the sum is 70.

The spelling of 399901028480377 in words is "three hundred ninety-nine trillion, nine hundred one billion, twenty-eight million, four hundred eighty thousand, three hundred seventy-seven".