50981281536 has 72 divisors (see below), whose sum is σ = 142825889920. Its totient is φ = 16099347456.

The previous prime is 50981281529. The next prime is 50981281541. The reversal of 50981281536 is 63518218905.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1732300 + ... + 1761483.

Almost surely, 2^50981281536 is an apocalyptic number.

It is an amenable number.

50981281536 is an abundant number, since it is smaller than the sum of its proper divisors (91844608384).

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

50981281536 is a wasteful number, since it uses less digits than its factorization.

50981281536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3493821 (or 3493807 counting only the distinct ones).

The product of its (nonzero) digits is 518400, while the sum is 48.

The spelling of 50981281536 in words is "fifty billion, nine hundred eighty-one million, two hundred eighty-one thousand, five hundred thirty-six".