157826378849 has 2 divisors, whose sum is σ = 157826378850. Its totient is φ = 157826378848.

The previous prime is 157826378837. The next prime is 157826378893. The reversal of 157826378849 is 948873628751.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 124445261824 + 33381117025 = 352768^2 + 182705^2 .

It is a cyclic number.

It is not a de Polignac number, because 157826378849 - 2¹² = 157826374753 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (157826278849) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78913189424 + 78913189425.

It is an arithmetic number, because the mean of its divisors is an integer number (78913189425).

Almost surely, 2^157826378849 is an apocalyptic number.

It is an amenable number.

157826378849 is a deficient number, since it is larger than the sum of its proper divisors (1).

157826378849 is an equidigital number, since it uses as much as digits as its factorization.

157826378849 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 162570240, while the sum is 68.

The spelling of 157826378849 in words is "one hundred fifty-seven billion, eight hundred twenty-six million, three hundred seventy-eight thousand, eight hundred forty-nine".