6406908373457 has 2 divisors, whose sum is σ = 6406908373458. Its totient is φ = 6406908373456.

The previous prime is 6406908373399. The next prime is 6406908373577. The reversal of 6406908373457 is 7543738096046.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5971567055041 + 435341318416 = 2443679^2 + 659804^2 .

It is a cyclic number.

It is not a de Polignac number, because 6406908373457 - 2¹² = 6406908369361 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 6406908373457.

It is not a weakly prime, because it can be changed into another prime (6406908375457) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3203454186728 + 3203454186729.

It is an arithmetic number, because the mean of its divisors is an integer number (3203454186729).

Almost surely, 2^{6406908373457} is an apocalyptic number.

It is an amenable number.

6406908373457 is a deficient number, since it is larger than the sum of its proper divisors (1).

6406908373457 is an equidigital number, since it uses as much as digits as its factorization.

6406908373457 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 91445760, while the sum is 62.

The spelling of 6406908373457 in words is "six trillion, four hundred six billion, nine hundred eight million, three hundred seventy-three thousand, four hundred fifty-seven".