1178315773381 has 2 divisors, whose sum is σ = 1178315773382. Its totient is φ = 1178315773380.

The previous prime is 1178315773351. The next prime is 1178315773451. The reversal of 1178315773381 is 1833775138711.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1045575781156 + 132739992225 = 1022534^2 + 364335^2 .

It is a cyclic number.

It is not a de Polignac number, because 1178315773381 - 2¹³ = 1178315765189 is a prime.

It is a super-2 number, since 2×1178315773381² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1178315773321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 589157886690 + 589157886691.

It is an arithmetic number, because the mean of its divisors is an integer number (589157886691).

Almost surely, 2^{1178315773381} is an apocalyptic number.

It is an amenable number.

1178315773381 is a deficient number, since it is larger than the sum of its proper divisors (1).

1178315773381 is an equidigital number, since it uses as much as digits as its factorization.

1178315773381 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2963520, while the sum is 55.

The spelling of 1178315773381 in words is "one trillion, one hundred seventy-eight billion, three hundred fifteen million, seven hundred seventy-three thousand, three hundred eighty-one".