51379441866 has 12 divisors (see below), whose sum is σ = 111322124082. Its totient is φ = 17126480616.

The previous prime is 51379441849. The next prime is 51379441873. The reversal of 51379441866 is 66814497315.

51379441866 is a `hidden beast` number, since 5 + 137 + 9 + 441 + 8 + 66 = 666.

51379441866 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 38975051241 + 12404390625 = 197421^2 + 111375^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1427206701 + ... + 1427206736.

Almost surely, 2^51379441866 is an apocalyptic number.

51379441866 is an abundant number, since it is smaller than the sum of its proper divisors (59942682216).

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

51379441866 is a wasteful number, since it uses less digits than its factorization.

51379441866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2854413445 (or 2854413442 counting only the distinct ones).

The product of its digits is 4354560, while the sum is 54.

The spelling of 51379441866 in words is "fifty-one billion, three hundred seventy-nine million, four hundred forty-one thousand, eight hundred sixty-six".