50778075581 has 8 divisors (see below), whose sum is σ = 51134361600. Its totient is φ = 50422205808.

The previous prime is 50778075571. The next prime is 50778075619. The reversal of 50778075581 is 18557087705.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-50778075581 is a prime.

It is a super-2 number, since 2×50778075581² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (50778075571) 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 7 ways as a sum of consecutive naturals, for example, 142820 + ... + 349218.

It is an arithmetic number, because the mean of its divisors is an integer number (6391795200).

Almost surely, 2^50778075581 is an apocalyptic number.

It is an amenable number.

50778075581 is a deficient number, since it is larger than the sum of its proper divisors (356286019).

50778075581 is a wasteful number, since it uses less digits than its factorization.

50778075581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 208123.

The product of its (nonzero) digits is 2744000, while the sum is 53.

The spelling of 50778075581 in words is "fifty billion, seven hundred seventy-eight million, seventy-five thousand, five hundred eighty-one".