51676505413 has 4 divisors (see below), whose sum is σ = 55651621228. Its totient is φ = 47701389600.

The previous prime is 51676505389. The next prime is 51676505431. The reversal of 51676505413 is 31450567615.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 19864929249 + 31811576164 = 140943^2 + 178358^2 .

It is a cyclic number.

It is not a de Polignac number, because 51676505413 - 2⁵ = 51676505381 is a prime.

It is a super-2 number, since 2×51676505413² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 51676505413.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51676505453) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1987557888 + ... + 1987557913.

It is an arithmetic number, because the mean of its divisors is an integer number (13912905307).

Almost surely, 2^51676505413 is an apocalyptic number.

It is an amenable number.

51676505413 is a deficient number, since it is larger than the sum of its proper divisors (3975115815).

51676505413 is a wasteful number, since it uses less digits than its factorization.

51676505413 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3975115814.

The product of its (nonzero) digits is 378000, while the sum is 43.

The spelling of 51676505413 in words is "fifty-one billion, six hundred seventy-six million, five hundred five thousand, four hundred thirteen".