157718476849 has 2 divisors, whose sum is σ = 157718476850. Its totient is φ = 157718476848.

The previous prime is 157718476711. The next prime is 157718476889. The reversal of 157718476849 is 948674817751.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 133400257600 + 24318219249 = 365240^2 + 155943^2 .

It is a cyclic number.

It is not a de Polignac number, because 157718476849 - 2¹⁷ = 157718345777 is a prime.

It is not a weakly prime, because it can be changed into another prime (157718476889) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78859238424 + 78859238425.

It is an arithmetic number, because the mean of its divisors is an integer number (78859238425).

Almost surely, 2^157718476849 is an apocalyptic number.

It is an amenable number.

157718476849 is a deficient number, since it is larger than the sum of its proper divisors (1).

157718476849 is an equidigital number, since it uses as much as digits as its factorization.

157718476849 is an evil number, because the sum of its binary digits is even.

The product of its digits is 94832640, while the sum is 67.

The spelling of 157718476849 in words is "one hundred fifty-seven billion, seven hundred eighteen million, four hundred seventy-six thousand, eight hundred forty-nine".