1136676781 has 4 divisors (see below), whose sum is σ = 1142566492. Its totient is φ = 1130787072.

The previous prime is 1136676773. The next prime is 1136676817. The reversal of 1136676781 is 1876766311.

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 175986756 + 960690025 = 13266^2 + 30995^2 .

It is a cyclic number.

It is not a de Polignac number, because 1136676781 - 2³ = 1136676773 is a prime.

It is a super-2 number, since 2×1136676781² = 2584068208929043922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1136676481) 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, 2944566 + ... + 2944951.

It is an arithmetic number, because the mean of its divisors is an integer number (285641623).

Almost surely, 2^1136676781 is an apocalyptic number.

It is an amenable number.

1136676781 is a deficient number, since it is larger than the sum of its proper divisors (5889711).

1136676781 is an equidigital number, since it uses as much as digits as its factorization.

1136676781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5889710.

The product of its digits is 254016, while the sum is 46.

The square root of 1136676781 is about 33714.6374887822. The cubic root of 1136676781 is about 1043.6278568342.

The spelling of 1136676781 in words is "one billion, one hundred thirty-six million, six hundred seventy-six thousand, seven hundred eighty-one".