11310478381 has 4 divisors (see below), whose sum is σ = 11318507100. Its totient is φ = 11302449664.

The previous prime is 11310478379. The next prime is 11310478391. The reversal of 11310478381 is 18387401311.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 18387401311 = 241 ⋅76296271.

It can be written as a sum of positive squares in 2 ways, for example, as 2689355881 + 8621122500 = 51859^2 + 92850^2 .

It is a cyclic number.

It is not a de Polignac number, because 11310478381 - 2¹ = 11310478379 is a prime.

It is a super-2 number, since 2×11310478381² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 11310478381.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11310478331) 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 3 ways as a sum of consecutive naturals, for example, 4012246 + ... + 4015063.

It is an arithmetic number, because the mean of its divisors is an integer number (2829626775).

Almost surely, 2^11310478381 is an apocalyptic number.

It is an amenable number.

11310478381 is a deficient number, since it is larger than the sum of its proper divisors (8028719).

11310478381 is an equidigital number, since it uses as much as digits as its factorization.

11310478381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8028718.

The product of its (nonzero) digits is 16128, while the sum is 37.

Adding to 11310478381 its reverse (18387401311), we get a palindrome (29697879692).

The spelling of 11310478381 in words is "eleven billion, three hundred ten million, four hundred seventy-eight thousand, three hundred eighty-one".