1650847872397 has 2 divisors, whose sum is σ = 1650847872398. Its totient is φ = 1650847872396.

The previous prime is 1650847872389. The next prime is 1650847872469. The reversal of 1650847872397 is 7932787480561.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1268842292041 + 382005580356 = 1126429^2 + 618066^2 .

It is a cyclic number.

It is not a de Polignac number, because 1650847872397 - 2³ = 1650847872389 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1650847872347) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 825423936198 + 825423936199.

It is an arithmetic number, because the mean of its divisors is an integer number (825423936199).

It is a 1-persistent number, because it is pandigital, but 2⋅1650847872397 = 3301695744794 is not.

Almost surely, 2^{1650847872397} is an apocalyptic number.

It is an amenable number.

1650847872397 is a deficient number, since it is larger than the sum of its proper divisors (1).

1650847872397 is an equidigital number, since it uses as much as digits as its factorization.

1650847872397 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 142248960, while the sum is 67.

The spelling of 1650847872397 in words is "one trillion, six hundred fifty billion, eight hundred forty-seven million, eight hundred seventy-two thousand, three hundred ninety-seven".