1187828287811 has 12 divisors (see below), whose sum is σ = 1320723315240. Its totient is φ = 1059469457280.

The previous prime is 1187828287777. The next prime is 1187828287823.

1187828287811 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 1187828287811 - 2¹⁰ = 1187828286787 is a prime.

It is a super-3 number, since 3×1187828287811³ (a number of 37 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1187828287411) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 19190246 + ... + 19252043.

It is an arithmetic number, because the mean of its divisors is an integer number (110060276270).

Almost surely, 2^{1187828287811} is an apocalyptic number.

1187828287811 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1187828287811 is a deficient number, since it is larger than the sum of its proper divisors (132895027429).

1187828287811 is an equidigital number, since it uses as much as digits as its factorization.

1187828287811 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38442406 (or 38442353 counting only the distinct ones).

The product of its digits is 6422528, while the sum is 62.

The spelling of 1187828287811 in words is "one trillion, one hundred eighty-seven billion, eight hundred twenty-eight million, two hundred eighty-seven thousand, eight hundred eleven".