49278635648 has 256 divisors, whose sum is σ = 116413562880. Its totient is φ = 20545536000.

The previous prime is 49278635647. The next prime is 49278635677. The reversal of 49278635648 is 84653687294.

It is a Harshad number since it is a multiple of its sum of digits (62).

It is not an unprimeable number, because it can be changed into a prime (49278635647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 191745536 + ... + 191745792.

It is an arithmetic number, because the mean of its divisors is an integer number (454740480).

Almost surely, 2^49278635648 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 49278635648, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (58206781440).

49278635648 is an abundant number, since it is smaller than the sum of its proper divisors (67134927232).

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

49278635648 is a wasteful number, since it uses less digits than its factorization.

49278635648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 527 (or 515 counting only the distinct ones).

The product of its digits is 69672960, while the sum is 62.

The spelling of 49278635648 in words is "forty-nine billion, two hundred seventy-eight million, six hundred thirty-five thousand, six hundred forty-eight".