1178074251157 has 2 divisors, whose sum is σ = 1178074251158. Its totient is φ = 1178074251156.

The previous prime is 1178074251121. The next prime is 1178074251241. The reversal of 1178074251157 is 7511524708711.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 804036815761 + 374037435396 = 896681^2 + 611586^2 .

It is an emirp because it is prime and its reverse (7511524708711) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1178074251157 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1178074251157.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1178074254157) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 589037125578 + 589037125579.

It is an arithmetic number, because the mean of its divisors is an integer number (589037125579).

Almost surely, 2^{1178074251157} is an apocalyptic number.

It is an amenable number.

1178074251157 is a deficient number, since it is larger than the sum of its proper divisors (1).

1178074251157 is an equidigital number, since it uses as much as digits as its factorization.

1178074251157 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 548800, while the sum is 49.

Adding to 1178074251157 its reverse (7511524708711), we get a palindrome (8689598959868).

The spelling of 1178074251157 in words is "one trillion, one hundred seventy-eight billion, seventy-four million, two hundred fifty-one thousand, one hundred fifty-seven".