51105550555 has 16 divisors (see below), whose sum is σ = 62548215840. Its totient is φ = 40076944128.

The previous prime is 51105550553. The next prime is 51105550583. The reversal of 51105550555 is 55505550115.

51105550555 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 51105550555 - 2¹ = 51105550553 is a prime.

It is a super-2 number, since 2×51105550555² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (51105550553) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 370000 + ... + 488989.

It is an arithmetic number, because the mean of its divisors is an integer number (3909263490).

Almost surely, 2^51105550555 is an apocalyptic number.

51105550555 is a deficient number, since it is larger than the sum of its proper divisors (11442665285).

51105550555 is a wasteful number, since it uses less digits than its factorization.

51105550555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 859230.

The product of its (nonzero) digits is 78125, while the sum is 37.

The spelling of 51105550555 in words is "fifty-one billion, one hundred five million, five hundred fifty thousand, five hundred fifty-five".