2446135981 has 4 divisors (see below), whose sum is σ = 2574880000. Its totient is φ = 2317391964.

The previous prime is 2446135961. The next prime is 2446135987. The reversal of 2446135981 is 1895316442.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1895316442 = 2 ⋅947658221.

It is a cyclic number.

It is not a de Polignac number, because 2446135981 - 2¹⁵ = 2446103213 is a prime.

It is a super-2 number, since 2×2446135981² = 11967162475085664722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2446135987) 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, 64371981 + ... + 64372018.

It is an arithmetic number, because the mean of its divisors is an integer number (643720000).

Almost surely, 2^2446135981 is an apocalyptic number.

It is an amenable number.

2446135981 is a deficient number, since it is larger than the sum of its proper divisors (128744019).

2446135981 is a wasteful number, since it uses less digits than its factorization.

2446135981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128744018.

The product of its digits is 207360, while the sum is 43.

The square root of 2446135981 is about 49458.4267946323. The cubic root of 2446135981 is about 1347.3906581937.

The spelling of 2446135981 in words is "two billion, four hundred forty-six million, one hundred thirty-five thousand, nine hundred eighty-one".