51782981153211 has 72 divisors (see below), whose sum is σ = 95841002409984. Its totient is φ = 26639082217440.

The previous prime is 51782981153131. The next prime is 51782981153227. The reversal of 51782981153211 is 11235118928715.

51782981153211 is a `hidden beast` number, since 5 + 1 + 7 + 8 + 2 + 98 + 1 + 1 + 532 + 11 = 666.

It is not a de Polignac number, because 51782981153211 - 2⁷ = 51782981153083 is a prime.

It is a super-3 number, since 3×51782981153211³ (a number of 42 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not an unprimeable number, because it can be changed into a prime (51782981153611) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 51319291 + ... + 52318596.

It is an arithmetic number, because the mean of its divisors is an integer number (1331125033472).

Almost surely, 2^{51782981153211} is an apocalyptic number.

51782981153211 is a deficient number, since it is larger than the sum of its proper divisors (44058021256773).

51782981153211 is a wasteful number, since it uses less digits than its factorization.

51782981153211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103638021 (or 103638011 counting only the distinct ones).

The product of its digits is 1209600, while the sum is 54.

The spelling of 51782981153211 in words is "fifty-one trillion, seven hundred eighty-two billion, nine hundred eighty-one million, one hundred fifty-three thousand, two hundred eleven".