1131787776 has 80 divisors (see below), whose sum is σ = 3445922304. Its totient is φ = 323364864.

The previous prime is 1131787771. The next prime is 1131787781. The reversal of 1131787776 is 6777871311.

It is an interprime number because it is at equal distance from previous prime (1131787771) and next prime (1131787781).

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1131787771) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 41880 + ... + 63383.

Almost surely, 2^1131787776 is an apocalyptic number.

1131787776 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1131787776 is an abundant number, since it is smaller than the sum of its proper divisors (2314134528).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1131787776 is an equidigital number, since it uses as much as digits as its factorization.

1131787776 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105291 (or 105275 counting only the distinct ones).

The product of its digits is 345744, while the sum is 48.

The square root of 1131787776 is about 33642.0536828535. The cubic root of 1131787776 is about 1042.1294436052.

The spelling of 1131787776 in words is "one billion, one hundred thirty-one million, seven hundred eighty-seven thousand, seven hundred seventy-six".