51438847248758 has 4 divisors (see below), whose sum is σ = 77158270873140. Its totient is φ = 25719423624378.

The previous prime is 51438847248647. The next prime is 51438847248769. The reversal of 51438847248758 is 85784274883415.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12859711812188 + ... + 12859711812191.

It is an arithmetic number, because the mean of its divisors is an integer number (19289567718285).

Almost surely, 2^{51438847248758} is an apocalyptic number.

51438847248758 is a deficient number, since it is larger than the sum of its proper divisors (25719423624382).

51438847248758 is a wasteful number, since it uses less digits than its factorization.

51438847248758 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25719423624381.

The product of its digits is 1926758400, while the sum is 74.

The spelling of 51438847248758 in words is "fifty-one trillion, four hundred thirty-eight billion, eight hundred forty-seven million, two hundred forty-eight thousand, seven hundred fifty-eight".