51065344551 has 16 divisors (see below), whose sum is σ = 74708083296. Its totient is φ = 30831904896.

The previous prime is 51065344543. The next prime is 51065344553. The reversal of 51065344551 is 15544356015.

It is not a de Polignac number, because 51065344551 - 2³ = 51065344543 is a prime.

It is a super-2 number, since 2×51065344551² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51065344553) 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, 12350460 + ... + 12354593.

It is an arithmetic number, because the mean of its divisors is an integer number (4669255206).

Almost surely, 2^51065344551 is an apocalyptic number.

51065344551 is a deficient number, since it is larger than the sum of its proper divisors (23642738745).

51065344551 is a wasteful number, since it uses less digits than its factorization.

51065344551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24705122.

The product of its (nonzero) digits is 180000, while the sum is 39.

The spelling of 51065344551 in words is "fifty-one billion, sixty-five million, three hundred forty-four thousand, five hundred fifty-one".