851548506049 has 2 divisors, whose sum is σ = 851548506050. Its totient is φ = 851548506048.

The previous prime is 851548505987. The next prime is 851548506089. The reversal of 851548506049 is 940605845158.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 640736211600 + 210812294449 = 800460^2 + 459143^2 .

It is a cyclic number.

It is not a de Polignac number, because 851548506049 - 2⁷ = 851548505921 is a prime.

It is not a weakly prime, because it can be changed into another prime (851548506089) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 425774253024 + 425774253025.

It is an arithmetic number, because the mean of its divisors is an integer number (425774253025).

Almost surely, 2^851548506049 is an apocalyptic number.

It is an amenable number.

851548506049 is a deficient number, since it is larger than the sum of its proper divisors (1).

851548506049 is an equidigital number, since it uses as much as digits as its factorization.

851548506049 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6912000, while the sum is 55.

The spelling of 851548506049 in words is "eight hundred fifty-one billion, five hundred forty-eight million, five hundred six thousand, forty-nine".