51438623215485 has 32 divisors (see below), whose sum is σ = 89784963216000. Its totient is φ = 24939609497600.

The previous prime is 51438623215481. The next prime is 51438623215513. The reversal of 51438623215485 is 58451232683415.

It is not a de Polignac number, because 51438623215485 - 2² = 51438623215481 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51438623215481) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 10728265 + ... + 14763905.

It is an arithmetic number, because the mean of its divisors is an integer number (2805780100500).

Almost surely, 2^{51438623215485} is an apocalyptic number.

51438623215485 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

It is an amenable number.

51438623215485 is a deficient number, since it is larger than the sum of its proper divisors (38346340000515).

51438623215485 is a wasteful number, since it uses less digits than its factorization.

51438623215485 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4112909.

The product of its digits is 27648000, while the sum is 57.

The spelling of 51438623215485 in words is "fifty-one trillion, four hundred thirty-eight billion, six hundred twenty-three million, two hundred fifteen thousand, four hundred eighty-five".