51411661711 has 4 divisors (see below), whose sum is σ = 51602783400. Its totient is φ = 51220540024.

The previous prime is 51411661661. The next prime is 51411661757. The reversal of 51411661711 is 11716611415.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 11716611415 = 5 ⋅2343322283.

It is a cyclic number.

It is not a de Polignac number, because 51411661711 - 2⁷ = 51411661583 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51411661211) 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, 95560441 + ... + 95560978.

It is an arithmetic number, because the mean of its divisors is an integer number (12900695850).

Almost surely, 2^51411661711 is an apocalyptic number.

51411661711 is a deficient number, since it is larger than the sum of its proper divisors (191121689).

51411661711 is a wasteful number, since it uses less digits than its factorization.

51411661711 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 191121688.

The product of its digits is 5040, while the sum is 34.

It can be divided in two parts, 514 and 11661711, that added together give a square (11662225 = 3415²).

The spelling of 51411661711 in words is "fifty-one billion, four hundred eleven million, six hundred sixty-one thousand, seven hundred eleven".