11278592981 has 4 divisors (see below), whose sum is σ = 11325392364. Its totient is φ = 11231793600.

The previous prime is 11278592959. The next prime is 11278593077. The reversal of 11278592981 is 18929587211.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 18929587211 = 1093 ⋅17318927.

It can be written as a sum of positive squares in 2 ways, for example, as 5588908081 + 5689684900 = 74759^2 + 75430^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11278592981 is a prime.

It is a super-2 number, since 2×11278592981² (a number of 21 digits) 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 (11278592951) 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, 23399330 + ... + 23399811.

It is an arithmetic number, because the mean of its divisors is an integer number (2831348091).

Almost surely, 2^11278592981 is an apocalyptic number.

It is an amenable number.

11278592981 is a deficient number, since it is larger than the sum of its proper divisors (46799383).

11278592981 is an equidigital number, since it uses as much as digits as its factorization.

11278592981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46799382.

The product of its digits is 725760, while the sum is 53.

The spelling of 11278592981 in words is "eleven billion, two hundred seventy-eight million, five hundred ninety-two thousand, nine hundred eighty-one".