2444148809781 has 16 divisors (see below), whose sum is σ = 3724541149824. Its totient is φ = 1396609994304.

The previous prime is 2444148809747. The next prime is 2444148809863. The reversal of 2444148809781 is 1879088414442.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-2444148809781 is a prime.

It is a super-3 number, since 3×2444148809781³ (a number of 38 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2444148809881) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1284886 + ... + 2557191.

It is an arithmetic number, because the mean of its divisors is an integer number (232783821864).

Almost surely, 2^{2444148809781} is an apocalyptic number.

2444148809781 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

2444148809781 is a deficient number, since it is larger than the sum of its proper divisors (1280392340043).

2444148809781 is a wasteful number, since it uses less digits than its factorization.

2444148809781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3872380.

The product of its (nonzero) digits is 16515072, while the sum is 60.

The spelling of 2444148809781 in words is "two trillion, four hundred forty-four billion, one hundred forty-eight million, eight hundred nine thousand, seven hundred eighty-one".