202054779781 has 12 divisors (see below), whose sum is σ = 206923072800. Its totient is φ = 197298528840.

The previous prime is 202054779757. The next prime is 202054779791. The reversal of 202054779781 is 187977450202.

202054779781 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 202054779781 - 2¹⁷ = 202054648709 is a prime.

It is a super-2 number, since 2×202054779781² (a number of 23 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 (202054779721) 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 11 ways as a sum of consecutive naturals, for example, 7254520 + ... + 7282318.

It is an arithmetic number, because the mean of its divisors is an integer number (17243589400).

Almost surely, 2^202054779781 is an apocalyptic number.

It is an amenable number.

202054779781 is a deficient number, since it is larger than the sum of its proper divisors (4868293019).

202054779781 is an equidigital number, since it uses as much as digits as its factorization.

202054779781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31816 (or 31773 counting only the distinct ones).

The product of its (nonzero) digits is 1975680, while the sum is 52.

The spelling of 202054779781 in words is "two hundred two billion, fifty-four million, seven hundred seventy-nine thousand, seven hundred eighty-one".