1188996581761 has 2 divisors, whose sum is σ = 1188996581762. Its totient is φ = 1188996581760.

The previous prime is 1188996581753. The next prime is 1188996581779. The reversal of 1188996581761 is 1671856998811.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1185145758736 + 3850823025 = 1088644^2 + 62055^2 .

It is a cyclic number.

It is not a de Polignac number, because 1188996581761 - 2³ = 1188996581753 is a prime.

It is a super-2 number, since 2×1188996581761² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1188996588761) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 594498290880 + 594498290881.

It is an arithmetic number, because the mean of its divisors is an integer number (594498290881).

Almost surely, 2^{1188996581761} is an apocalyptic number.

It is an amenable number.

1188996581761 is a deficient number, since it is larger than the sum of its proper divisors (1).

1188996581761 is an equidigital number, since it uses as much as digits as its factorization.

1188996581761 is an evil number, because the sum of its binary digits is even.

The product of its digits is 52254720, while the sum is 70.

The spelling of 1188996581761 in words is "one trillion, one hundred eighty-eight billion, nine hundred ninety-six million, five hundred eighty-one thousand, seven hundred sixty-one".