51026578458647 has 4 divisors (see below), whose sum is σ = 55665358318536. Its totient is φ = 46387798598760.

The previous prime is 51026578458637. The next prime is 51026578458787. The reversal of 51026578458647 is 74685487562015.

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

It is a cyclic number.

It is not a de Polignac number, because 51026578458647 - 2¹⁰ = 51026578457623 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51026578458637) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2319389929928 + ... + 2319389929949.

It is an arithmetic number, because the mean of its divisors is an integer number (13916339579634).

Almost surely, 2^{51026578458647} is an apocalyptic number.

51026578458647 is a deficient number, since it is larger than the sum of its proper divisors (4638779859889).

51026578458647 is a wasteful number, since it uses less digits than its factorization.

51026578458647 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4638779859888.

The product of its (nonzero) digits is 451584000, while the sum is 68.

The spelling of 51026578458647 in words is "fifty-one trillion, twenty-six billion, five hundred seventy-eight million, four hundred fifty-eight thousand, six hundred forty-seven".