51866281374 has 16 divisors (see below), whose sum is σ = 103735607040. Its totient is φ = 17288253080.

The previous prime is 51866281343. The next prime is 51866281387. The reversal of 51866281374 is 47318266815.

51866281374 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×51866281374² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 136789 + ... + 349919.

It is an arithmetic number, because the mean of its divisors is an integer number (6483475440).

Almost surely, 2^51866281374 is an apocalyptic number.

51866281374 is an abundant number, since it is smaller than the sum of its proper divisors (51869325666).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51866281374 is a wasteful number, since it uses less digits than its factorization.

51866281374 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 253695.

The product of its digits is 1935360, while the sum is 51.

The spelling of 51866281374 in words is "fifty-one billion, eight hundred sixty-six million, two hundred eighty-one thousand, three hundred seventy-four".