1155618791377 has 4 divisors (see below), whose sum is σ = 1158287657380. Its totient is φ = 1152949925376.

The previous prime is 1155618791333. The next prime is 1155618791471. The reversal of 1155618791377 is 7731978165511.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 398595246336 + 757023545041 = 631344^2 + 870071^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1155618791377 is a prime.

It is a super-2 number, since 2×1155618791377² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1155618791317) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1334432352 + ... + 1334433217.

It is an arithmetic number, because the mean of its divisors is an integer number (289571914345).

Almost surely, 2^{1155618791377} is an apocalyptic number.

It is an amenable number.

1155618791377 is a deficient number, since it is larger than the sum of its proper divisors (2668866003).

1155618791377 is an equidigital number, since it uses as much as digits as its factorization.

1155618791377 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2668866002.

The product of its digits is 11113200, while the sum is 61.

The spelling of 1155618791377 in words is "one trillion, one hundred fifty-five billion, six hundred eighteen million, seven hundred ninety-one thousand, three hundred seventy-seven".