147731557709 has 2 divisors, whose sum is σ = 147731557710. Its totient is φ = 147731557708.

The previous prime is 147731557697. The next prime is 147731557733. The reversal of 147731557709 is 907755137741.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 80611702084 + 67119855625 = 283922^2 + 259075^2 .

It is a cyclic number.

It is not a de Polignac number, because 147731557709 - 2⁸ = 147731557453 is a prime.

It is a super-2 number, since 2×147731557709² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (147731557739) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 73865778854 + 73865778855.

It is an arithmetic number, because the mean of its divisors is an integer number (73865778855).

Almost surely, 2^147731557709 is an apocalyptic number.

It is an amenable number.

147731557709 is a deficient number, since it is larger than the sum of its proper divisors (1).

147731557709 is an equidigital number, since it uses as much as digits as its factorization.

147731557709 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6482700, while the sum is 56.

The spelling of 147731557709 in words is "one hundred forty-seven billion, seven hundred thirty-one million, five hundred fifty-seven thousand, seven hundred nine".