157687852109 has 2 divisors, whose sum is σ = 157687852110. Its totient is φ = 157687852108.

The previous prime is 157687852039. The next prime is 157687852121. The reversal of 157687852109 is 901258786751.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 150968771209 + 6719080900 = 388547^2 + 81970^2 .

It is a cyclic number.

It is not a de Polignac number, because 157687852109 - 2³⁶ = 88968375373 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (157687852169) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78843926054 + 78843926055.

It is an arithmetic number, because the mean of its divisors is an integer number (78843926055).

Almost surely, 2^157687852109 is an apocalyptic number.

It is an amenable number.

157687852109 is a deficient number, since it is larger than the sum of its proper divisors (1).

157687852109 is an equidigital number, since it uses as much as digits as its factorization.

157687852109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8467200, while the sum is 59.

The spelling of 157687852109 in words is "one hundred fifty-seven billion, six hundred eighty-seven million, eight hundred fifty-two thousand, one hundred nine".