157802378281 has 2 divisors, whose sum is σ = 157802378282. Its totient is φ = 157802378280.

The previous prime is 157802378179. The next prime is 157802378323. The reversal of 157802378281 is 182873208751.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 154213290000 + 3589088281 = 392700^2 + 59909^2 .

It is a cyclic number.

It is not a de Polignac number, because 157802378281 - 2⁹ = 157802377769 is a prime.

It is a super-2 number, since 2×157802378281² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (157802358281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78901189140 + 78901189141.

It is an arithmetic number, because the mean of its divisors is an integer number (78901189141).

Almost surely, 2^157802378281 is an apocalyptic number.

It is an amenable number.

157802378281 is a deficient number, since it is larger than the sum of its proper divisors (1).

157802378281 is an equidigital number, since it uses as much as digits as its factorization.

157802378281 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1505280, while the sum is 52.

The spelling of 157802378281 in words is "one hundred fifty-seven billion, eight hundred two million, three hundred seventy-eight thousand, two hundred eighty-one".