51186450877 has 4 divisors (see below), whose sum is σ = 51305213376. Its totient is φ = 51067688380.

The previous prime is 51186450869. The next prime is 51186450919. The reversal of 51186450877 is 77805468115.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 51186450877 - 2³ = 51186450869 is a prime.

It is a super-3 number, since 3×51186450877³ (a number of 33 digits) contains 333 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 (51186450827) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 59380603 + ... + 59381464.

It is an arithmetic number, because the mean of its divisors is an integer number (12826303344).

Almost surely, 2^51186450877 is an apocalyptic number.

It is an amenable number.

51186450877 is a deficient number, since it is larger than the sum of its proper divisors (118762499).

51186450877 is a wasteful number, since it uses less digits than its factorization.

51186450877 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 118762498.

The product of its (nonzero) digits is 1881600, while the sum is 52.

The spelling of 51186450877 in words is "fifty-one billion, one hundred eighty-six million, four hundred fifty thousand, eight hundred seventy-seven".