50402505128 has 8 divisors (see below), whose sum is σ = 94504697130. Its totient is φ = 25201252560.

The previous prime is 50402505103. The next prime is 50402505143. The reversal of 50402505128 is 82150520405.

50402505128 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 49854851524 + 547653604 = 223282^2 + 23402^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a junction number, because it is equal to n+sod(n) for n = 50402505094 and 50402505103.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3150156563 + ... + 3150156578.

Almost surely, 2^50402505128 is an apocalyptic number.

It is an amenable number.

50402505128 is a deficient number, since it is larger than the sum of its proper divisors (44102192002).

50402505128 is a wasteful number, since it uses less digits than its factorization.

50402505128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6300313147 (or 6300313143 counting only the distinct ones).

The product of its (nonzero) digits is 16000, while the sum is 32.

The spelling of 50402505128 in words is "fifty billion, four hundred two million, five hundred five thousand, one hundred twenty-eight".