51265055505 has 8 divisors (see below), whose sum is σ = 82024088832. Its totient is φ = 27341362928.

The previous prime is 51265055503. The next prime is 51265055521. The reversal of 51265055505 is 50555056215.

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 51265055505 - 2¹ = 51265055503 is a prime.

It is a super-3 number, since 3×51265055505³ (a number of 33 digits) contains 333 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (51265055503) 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, 1708835169 + ... + 1708835198.

It is an arithmetic number, because the mean of its divisors is an integer number (10253011104).

Almost surely, 2^51265055505 is an apocalyptic number.

It is an amenable number.

51265055505 is a deficient number, since it is larger than the sum of its proper divisors (30759033327).

51265055505 is a wasteful number, since it uses less digits than its factorization.

51265055505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3417670375.

The product of its (nonzero) digits is 187500, while the sum is 39.

The spelling of 51265055505 in words is "fifty-one billion, two hundred sixty-five million, fifty-five thousand, five hundred five".