51656144630 has 8 divisors (see below), whose sum is σ = 92981060352. Its totient is φ = 20662457848.

The previous prime is 51656144621. The next prime is 51656144633. The reversal of 51656144630 is 3644165615.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51656144633) by changing a digit.

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, 2582807222 + ... + 2582807241.

It is an arithmetic number, because the mean of its divisors is an integer number (11622632544).

Almost surely, 2^51656144630 is an apocalyptic number.

51656144630 is a deficient number, since it is larger than the sum of its proper divisors (41324915722).

51656144630 is a wasteful number, since it uses less digits than its factorization.

51656144630 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5165614470.

The product of its (nonzero) digits is 259200, while the sum is 41.

The spelling of 51656144630 in words is "fifty-one billion, six hundred fifty-six million, one hundred forty-four thousand, six hundred thirty".