51505554005 has 8 divisors (see below), whose sum is σ = 61981756632. Its totient is φ = 41087715328.

The previous prime is 51505553993. The next prime is 51505554011. The reversal of 51505554005 is 50045550515.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 18767356036 + 32738197969 = 136994^2 + 180937^2 .

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 51505554005 - 2⁶ = 51505553941 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14589044 + ... + 14592573.

It is an arithmetic number, because the mean of its divisors is an integer number (7747719579).

Almost surely, 2^51505554005 is an apocalyptic number.

It is an amenable number.

51505554005 is a deficient number, since it is larger than the sum of its proper divisors (10476202627).

51505554005 is a wasteful number, since it uses less digits than its factorization.

51505554005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29181975.

The product of its (nonzero) digits is 62500, while the sum is 35.

The spelling of 51505554005 in words is "fifty-one billion, five hundred five million, five hundred fifty-four thousand, five".