51827561511 has 8 divisors (see below), whose sum is σ = 75385544064. Its totient is φ = 31410643320.

The previous prime is 51827561501. The next prime is 51827561561. The reversal of 51827561511 is 11516572815.

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

It is not a de Polignac number, because 51827561511 - 2⁶ = 51827561447 is a prime.

It is a super-2 number, since 2×51827561511² (a number of 22 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51827561501) 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, 785266051 + ... + 785266116.

It is an arithmetic number, because the mean of its divisors is an integer number (9423193008).

Almost surely, 2^51827561511 is an apocalyptic number.

51827561511 is a deficient number, since it is larger than the sum of its proper divisors (23557982553).

51827561511 is a wasteful number, since it uses less digits than its factorization.

51827561511 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1570532181.

The product of its digits is 84000, while the sum is 42.

The spelling of 51827561511 in words is "fifty-one billion, eight hundred twenty-seven million, five hundred sixty-one thousand, five hundred eleven".