50639940771840 has 1792 divisors, whose sum is σ = 211372469913600. Its totient is φ = 11263694340096.

The previous prime is 50639940771811. The next prime is 50639940771857. The reversal of 50639940771840 is 4817704993605.

50639940771840 is a `hidden beast` number, since 5 + 0 + 63 + 99 + 407 + 7 + 1 + 84 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (1792).

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 46162206172 + ... + 46162207268.

Almost surely, 2^{50639940771840} 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 50639940771840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (105686234956800).

50639940771840 is an abundant number, since it is smaller than the sum of its proper divisors (160732529141760).

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

50639940771840 is a wasteful number, since it uses less digits than its factorization.

50639940771840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1300 (or 1270 counting only the distinct ones).

The product of its (nonzero) digits is 45722880, while the sum is 63.

The spelling of 50639940771840 in words is "fifty trillion, six hundred thirty-nine billion, nine hundred forty million, seven hundred seventy-one thousand, eight hundred forty".