11746818981 has 12 divisors (see below), whose sum is σ = 16970329740. Its totient is φ = 7829965440.

The previous prime is 11746818947. The next prime is 11746818997. The reversal of 11746818981 is 18981864711.

It can be written as a sum of positive squares in 2 ways, for example, as 11074194756 + 672624225 = 105234^2 + 25935^2 .

It is not a de Polignac number, because 11746818981 - 2¹⁵ = 11746786213 is a prime.

It is a super-2 number, since 2×11746818981² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11746818581) 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, 42366 + ... + 159023.

It is an arithmetic number, because the mean of its divisors is an integer number (1414194145).

Almost surely, 2^11746818981 is an apocalyptic number.

It is an amenable number.

11746818981 is a deficient number, since it is larger than the sum of its proper divisors (5223510759).

11746818981 is a wasteful number, since it uses less digits than its factorization.

11746818981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 207876 (or 207873 counting only the distinct ones).

The product of its digits is 774144, while the sum is 54.

The spelling of 11746818981 in words is "eleven billion, seven hundred forty-six million, eight hundred eighteen thousand, nine hundred eighty-one".