50168987638 has 64 divisors (see below), whose sum is σ = 95201215488. Its totient is φ = 19259665920.

The previous prime is 50168987633. The next prime is 50168987651. The reversal of 50168987638 is 83678986105.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (50168987633) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 18064506 + ... + 18067282.

It is an arithmetic number, because the mean of its divisors is an integer number (1487518992).

Almost surely, 2^50168987638 is an apocalyptic number.

50168987638 is a deficient number, since it is larger than the sum of its proper divisors (45032227850).

50168987638 is a wasteful number, since it uses less digits than its factorization.

50168987638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4477.

The product of its (nonzero) digits is 17418240, while the sum is 61.

The spelling of 50168987638 in words is "fifty billion, one hundred sixty-eight million, nine hundred eighty-seven thousand, six hundred thirty-eight".