49439981261448 has 192 divisors, whose sum is σ = 139790497766400. Its totient is φ = 15767136000000.

The previous prime is 49439981261443. The next prime is 49439981261521. The reversal of 49439981261448 is 84416218993494.

49439981261448 is a `hidden beast` number, since 4 + 9 + 4 + 39 + 98 + 1 + 2 + 61 + 448 = 666.

It is a Cunningham number, because it is equal to 7031357²-1.

It is a Harshad number since it is a multiple of its sum of digits (72).

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (49439981261443) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2503153573 + ... + 2503173323.

It is an arithmetic number, because the mean of its divisors is an integer number (728075509200).

Almost surely, 2^{49439981261448} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 49439981261448, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (69895248883200).

49439981261448 is an abundant number, since it is smaller than the sum of its proper divisors (90350516504952).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

49439981261448 is a wasteful number, since it uses less digits than its factorization.

49439981261448 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32484 (or 32477 counting only the distinct ones).

The product of its digits is 429981696, while the sum is 72.

The spelling of 49439981261448 in words is "forty-nine trillion, four hundred thirty-nine billion, nine hundred eighty-one million, two hundred sixty-one thousand, four hundred forty-eight".