51655048861 has 8 divisors (see below), whose sum is σ = 55747639584. Its totient is φ = 47579476080.

The previous prime is 51655048853. The next prime is 51655048889. The reversal of 51655048861 is 16884055615.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 51655048861 - 2³ = 51655048853 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51685048861) 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 7 ways as a sum of consecutive naturals, for example, 4248175 + ... + 4260316.

It is an arithmetic number, because the mean of its divisors is an integer number (6968454948).

Almost surely, 2^51655048861 is an apocalyptic number.

It is an amenable number.

51655048861 is a deficient number, since it is larger than the sum of its proper divisors (4092590723).

51655048861 is a wasteful number, since it uses less digits than its factorization.

51655048861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8508971.

The product of its (nonzero) digits is 1152000, while the sum is 49.

The spelling of 51655048861 in words is "fifty-one billion, six hundred fifty-five million, forty-eight thousand, eight hundred sixty-one".