51286810894 has 8 divisors (see below), whose sum is σ = 83923872408. Its totient is φ = 23312186760.

The previous prime is 51286810871. The next prime is 51286810901. The reversal of 51286810894 is 49801868215.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1165609317 + ... + 1165609360.

It is an arithmetic number, because the mean of its divisors is an integer number (10490484051).

Almost surely, 2^51286810894 is an apocalyptic number.

51286810894 is a deficient number, since it is larger than the sum of its proper divisors (32637061514).

51286810894 is a wasteful number, since it uses less digits than its factorization.

51286810894 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2331218690.

The product of its (nonzero) digits is 1105920, while the sum is 52.

The spelling of 51286810894 in words is "fifty-one billion, two hundred eighty-six million, eight hundred ten thousand, eight hundred ninety-four".