51781678377422 has 32 divisors (see below), whose sum is σ = 92289255768000. Its totient is φ = 21773428089504.

The previous prime is 51781678377397. The next prime is 51781678377449. The reversal of 51781678377422 is 22477387618715.

It is a super-3 number, since 3×51781678377422³ (a number of 42 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 712072097 + ... + 712144812.

It is an arithmetic number, because the mean of its divisors is an integer number (2884039242750).

Almost surely, 2^{51781678377422} is an apocalyptic number.

51781678377422 is a deficient number, since it is larger than the sum of its proper divisors (40507577390578).

51781678377422 is a wasteful number, since it uses less digits than its factorization.

51781678377422 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1424216985 (or 1424216971 counting only the distinct ones).

The product of its digits is 221276160, while the sum is 68.

The spelling of 51781678377422 in words is "fifty-one trillion, seven hundred eighty-one billion, six hundred seventy-eight million, three hundred seventy-seven thousand, four hundred twenty-two".