11746039981 has 4 divisors (see below), whose sum is σ = 12649581532. Its totient is φ = 10842498432.

The previous prime is 11746039919. The next prime is 11746039997. The reversal of 11746039981 is 18993064711.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 587286756 + 11158753225 = 24234^2 + 105635^2 .

It is a cyclic number.

It is not a de Polignac number, because 11746039981 - 2¹³ = 11746031789 is a prime.

It is a super-2 number, since 2×11746039981² (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 (11746039681) 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, 451770756 + ... + 451770781.

It is an arithmetic number, because the mean of its divisors is an integer number (3162395383).

Almost surely, 2^11746039981 is an apocalyptic number.

It is an amenable number.

11746039981 is a deficient number, since it is larger than the sum of its proper divisors (903541551).

11746039981 is an equidigital number, since it uses as much as digits as its factorization.

11746039981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 903541550.

The product of its (nonzero) digits is 326592, while the sum is 49.

The spelling of 11746039981 in words is "eleven billion, seven hundred forty-six million, thirty-nine thousand, nine hundred eighty-one".