51110505235655 has 32 divisors (see below), whose sum is σ = 61807865106240. Its totient is φ = 40572822528000.

The previous prime is 51110505235651. The next prime is 51110505235661. The reversal of 51110505235655 is 55653250501115.

It is not a de Polignac number, because 51110505235655 - 2² = 51110505235651 is a prime.

It is a super-2 number, since 2×51110505235655² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51110505235651) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2129503655 + ... + 2129527655.

It is an arithmetic number, because the mean of its divisors is an integer number (1931495784570).

Almost surely, 2^{51110505235655} is an apocalyptic number.

51110505235655 is a deficient number, since it is larger than the sum of its proper divisors (10697359870585).

51110505235655 is a wasteful number, since it uses less digits than its factorization.

51110505235655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30419.

The product of its (nonzero) digits is 562500, while the sum is 44.

The spelling of 51110505235655 in words is "fifty-one trillion, one hundred ten billion, five hundred five million, two hundred thirty-five thousand, six hundred fifty-five".