50721118453989 has 24 divisors (see below), whose sum is σ = 77671165425152. Its totient is φ = 31838888648160.

The previous prime is 50721118453963. The next prime is 50721118453991. The reversal of 50721118453989 is 98935481112705.

50721118453989 is a `hidden beast` number, since 5 + 0 + 7 + 2 + 1 + 1 + 18 + 4 + 539 + 89 = 666.

50721118453989 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 50721118453989 - 2³¹ = 50718970970341 is a prime.

It is a Smith number, since the sum of its digits (63) coincides with the sum of the digits of its prime factors.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (50721118453949) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2456694049 + ... + 2456714694.

Almost surely, 2^{50721118453989} is an apocalyptic number.

It is an amenable number.

50721118453989 is a deficient number, since it is larger than the sum of its proper divisors (26950046971163).

50721118453989 is a wasteful number, since it uses less digits than its factorization.

50721118453989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4913408817 (or 4913408814 counting only the distinct ones).

The product of its (nonzero) digits is 21772800, while the sum is 63.

The spelling of 50721118453989 in words is "fifty trillion, seven hundred twenty-one billion, one hundred eighteen million, four hundred fifty-three thousand, nine hundred eighty-nine".