157286399993 has 2 divisors, whose sum is σ = 157286399994. Its totient is φ = 157286399992.

The previous prime is 157286399929. The next prime is 157286400023. The reversal of 157286399993 is 399993682751.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 142605927424 + 14680472569 = 377632^2 + 121163^2 .

It is a cyclic number.

It is not a de Polignac number, because 157286399993 - 2⁶ = 157286399929 is a prime.

It is a super-3 number, since 3×157286399993³ (a number of 35 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (157286399693) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78643199996 + 78643199997.

It is an arithmetic number, because the mean of its divisors is an integer number (78643199997).

Almost surely, 2^157286399993 is an apocalyptic number.

It is an amenable number.

157286399993 is a deficient number, since it is larger than the sum of its proper divisors (1).

157286399993 is an equidigital number, since it uses as much as digits as its factorization.

157286399993 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 198404640, while the sum is 71.

The spelling of 157286399993 in words is "one hundred fifty-seven billion, two hundred eighty-six million, three hundred ninety-nine thousand, nine hundred ninety-three".