51381356564602 has 16 divisors (see below), whose sum is σ = 77299419966912. Its totient is φ = 25614991445760.

The previous prime is 51381356564599. The next prime is 51381356564621. The reversal of 51381356564602 is 20646565318315.

51381356564602 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26100424 + ... + 27999907.

It is an arithmetic number, because the mean of its divisors is an integer number (4831213747932).

Almost surely, 2^{51381356564602} is an apocalyptic number.

51381356564602 is a deficient number, since it is larger than the sum of its proper divisors (25918063402310).

51381356564602 is a wasteful number, since it uses less digits than its factorization.

51381356564602 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54101733.

The product of its (nonzero) digits is 15552000, while the sum is 55.

The spelling of 51381356564602 in words is "fifty-one trillion, three hundred eighty-one billion, three hundred fifty-six million, five hundred sixty-four thousand, six hundred two".