440625066397 has 2 divisors, whose sum is σ = 440625066398. Its totient is φ = 440625066396.

The previous prime is 440625066361. The next prime is 440625066437. The reversal of 440625066397 is 793660526044.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 426573571876 + 14051494521 = 653126^2 + 118539^2 .

It is a cyclic number.

It is not a de Polignac number, because 440625066397 - 2²⁷ = 440490848669 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (440625066307) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 220312533198 + 220312533199.

It is an arithmetic number, because the mean of its divisors is an integer number (220312533199).

Almost surely, 2^440625066397 is an apocalyptic number.

It is an amenable number.

440625066397 is a deficient number, since it is larger than the sum of its proper divisors (1).

440625066397 is an equidigital number, since it uses as much as digits as its factorization.

440625066397 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6531840, while the sum is 52.

The spelling of 440625066397 in words is "four hundred forty billion, six hundred twenty-five million, sixty-six thousand, three hundred ninety-seven".