51445456626544 has 20 divisors (see below), whose sum is σ = 99683683553680. Its totient is φ = 25720635064320.

The previous prime is 51445456626511. The next prime is 51445456626569. The reversal of 51445456626544 is 44562665454415.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 130625292 + ... + 131018539.

It is an arithmetic number, because the mean of its divisors is an integer number (4984184177684).

Almost surely, 2^{51445456626544} is an apocalyptic number.

It is an amenable number.

51445456626544 is a deficient number, since it is larger than the sum of its proper divisors (48238226927136).

51445456626544 is a wasteful number, since it uses less digits than its factorization.

51445456626544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 261656128 (or 261656122 counting only the distinct ones).

The product of its digits is 276480000, while the sum is 61.

The spelling of 51445456626544 in words is "fifty-one trillion, four hundred forty-five billion, four hundred fifty-six million, six hundred twenty-six thousand, five hundred forty-four".