1551904468997 has 2 divisors, whose sum is σ = 1551904468998. Its totient is φ = 1551904468996.

The previous prime is 1551904468991. The next prime is 1551904469053. The reversal of 1551904468997 is 7998644091551.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 877952134081 + 673952334916 = 936991^2 + 820946^2 .

It is a cyclic number.

It is not a de Polignac number, because 1551904468997 - 2¹⁰ = 1551904467973 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1551904468991) 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, 775952234498 + 775952234499.

It is an arithmetic number, because the mean of its divisors is an integer number (775952234499).

Almost surely, 2^{1551904468997} is an apocalyptic number.

It is an amenable number.

1551904468997 is a deficient number, since it is larger than the sum of its proper divisors (1).

1551904468997 is an equidigital number, since it uses as much as digits as its factorization.

1551904468997 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 97977600, while the sum is 68.

The spelling of 1551904468997 in words is "one trillion, five hundred fifty-one billion, nine hundred four million, four hundred sixty-eight thousand, nine hundred ninety-seven".