51667711489 has 4 divisors (see below), whose sum is σ = 51693508656. Its totient is φ = 51641914324.

The previous prime is 51667711483. The next prime is 51667711523. The reversal of 51667711489 is 98411776615.

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 51667711489 - 2³ = 51667711481 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51667711481) 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, 12895579 + ... + 12899584.

It is an arithmetic number, because the mean of its divisors is an integer number (12923377164).

Almost surely, 2^51667711489 is an apocalyptic number.

It is an amenable number.

51667711489 is a deficient number, since it is larger than the sum of its proper divisors (25797167).

51667711489 is a wasteful number, since it uses less digits than its factorization.

51667711489 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25797166.

The product of its digits is 2540160, while the sum is 55.

The spelling of 51667711489 in words is "fifty-one billion, six hundred sixty-seven million, seven hundred eleven thousand, four hundred eighty-nine".