157340697809 has 2 divisors, whose sum is σ = 157340697810. Its totient is φ = 157340697808.

The previous prime is 157340697803. The next prime is 157340697853. The reversal of 157340697809 is 908796043751.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 114855243409 + 42485454400 = 338903^2 + 206120^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-157340697809 is a prime.

It is not a weakly prime, because it can be changed into another prime (157340697803) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78670348904 + 78670348905.

It is an arithmetic number, because the mean of its divisors is an integer number (78670348905).

Almost surely, 2^157340697809 is an apocalyptic number.

It is an amenable number.

157340697809 is a deficient number, since it is larger than the sum of its proper divisors (1).

157340697809 is an equidigital number, since it uses as much as digits as its factorization.

157340697809 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11430720, while the sum is 59.

The spelling of 157340697809 in words is "one hundred fifty-seven billion, three hundred forty million, six hundred ninety-seven thousand, eight hundred nine".