51005009653 has 8 divisors (see below), whose sum is σ = 54944391096. Its totient is φ = 47067902400.

The previous prime is 51005009647. The next prime is 51005009663. The reversal of 51005009653 is 35690050015.

It can be written as a sum of positive squares in 4 ways, for example, as 400689 + 51004608964 = 633^2 + 225842^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51005009653 is a prime.

It is a super-2 number, since 2×51005009653² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51005009663) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 521818 + ... + 611803.

It is an arithmetic number, because the mean of its divisors is an integer number (6868048887).

Almost surely, 2^51005009653 is an apocalyptic number.

It is an amenable number.

51005009653 is a deficient number, since it is larger than the sum of its proper divisors (3939381443).

51005009653 is a wasteful number, since it uses less digits than its factorization.

51005009653 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1137095.

The product of its (nonzero) digits is 20250, while the sum is 34.

Adding to 51005009653 its reverse (35690050015), we get a palindrome (86695059668).

The spelling of 51005009653 in words is "fifty-one billion, five million, nine thousand, six hundred fifty-three".