50812996821 has 16 divisors (see below), whose sum is σ = 71743320000. Its totient is φ = 31879409408.

The previous prime is 50812996811. The next prime is 50812996877. The reversal of 50812996821 is 12869921805.

It is a cyclic number.

It is not a de Polignac number, because 50812996821 - 2⁹ = 50812996309 is a prime.

It is a super-2 number, since 2×50812996821² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (50812996811) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 514555 + ... + 605303.

It is an arithmetic number, because the mean of its divisors is an integer number (4483957500).

Almost surely, 2^50812996821 is an apocalyptic number.

50812996821 is a gapful number since it is divisible by the number (51) formed by its first and last digit.

It is an amenable number.

50812996821 is a deficient number, since it is larger than the sum of its proper divisors (20930323179).

50812996821 is a wasteful number, since it uses less digits than its factorization.

50812996821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101748.

The product of its (nonzero) digits is 622080, while the sum is 51.

The spelling of 50812996821 in words is "fifty billion, eight hundred twelve million, nine hundred ninety-six thousand, eight hundred twenty-one".