51005501505506 has 16 divisors (see below), whose sum is σ = 77224097317824. Its totient is φ = 25264140761904.

The previous prime is 51005501505463. The next prime is 51005501505509. The reversal of 51005501505506 is 60550510550015.

It is a happy number.

It is a super-2 number, since 2×51005501505506² (a number of 28 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 51005501505506.

It is not an unprimeable number, because it can be changed into a prime (51005501505509) 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, 19906016 + ... + 22321748.

It is an arithmetic number, because the mean of its divisors is an integer number (4826506082364).

Almost surely, 2^{51005501505506} is an apocalyptic number.

51005501505506 is a deficient number, since it is larger than the sum of its proper divisors (26218595812318).

51005501505506 is a wasteful number, since it uses less digits than its factorization.

51005501505506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2514505.

The product of its (nonzero) digits is 93750, while the sum is 38.

The spelling of 51005501505506 in words is "fifty-one trillion, five billion, five hundred one million, five hundred five thousand, five hundred six".