51006105655 has 8 divisors (see below), whose sum is σ = 61276336992. Its totient is φ = 40758877728.

The previous prime is 51006105649. The next prime is 51006105659. The reversal of 51006105655 is 55650160015.

51006105655 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51006105655 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 51006105655.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51006105659) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5745972 + ... + 5754841.

It is an arithmetic number, because the mean of its divisors is an integer number (7659542124).

Almost surely, 2^51006105655 is an apocalyptic number.

51006105655 is a deficient number, since it is larger than the sum of its proper divisors (10270231337).

51006105655 is a wasteful number, since it uses less digits than its factorization.

51006105655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11501705.

The product of its (nonzero) digits is 22500, while the sum is 34.

The spelling of 51006105655 in words is "fifty-one billion, six million, one hundred five thousand, six hundred fifty-five".