1157236242509 has 2 divisors, whose sum is σ = 1157236242510. Its totient is φ = 1157236242508.

The previous prime is 1157236242413. The next prime is 1157236242553. The reversal of 1157236242509 is 9052426327511.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1035855772900 + 121380469609 = 1017770^2 + 348397^2 .

It is a cyclic number.

It is not a de Polignac number, because 1157236242509 - 2¹⁶ = 1157236176973 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1157236242599) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 578618121254 + 578618121255.

It is an arithmetic number, because the mean of its divisors is an integer number (578618121255).

Almost surely, 2^{1157236242509} is an apocalyptic number.

It is an amenable number.

1157236242509 is a deficient number, since it is larger than the sum of its proper divisors (1).

1157236242509 is an equidigital number, since it uses as much as digits as its factorization.

1157236242509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 907200, while the sum is 47.

The spelling of 1157236242509 in words is "one trillion, one hundred fifty-seven billion, two hundred thirty-six million, two hundred forty-two thousand, five hundred nine".