51416123009 has 4 divisors (see below), whose sum is σ = 51417542400. Its totient is φ = 51414703620.

The previous prime is 51416122993. The next prime is 51416123023. The reversal of 51416123009 is 90032161415.

51416123009 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 51416123009 - 2⁴ = 51416122993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51416123089) 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, 653897 + ... + 728294.

It is an arithmetic number, because the mean of its divisors is an integer number (12854385600).

Almost surely, 2^51416123009 is an apocalyptic number.

It is an amenable number.

51416123009 is a deficient number, since it is larger than the sum of its proper divisors (1419391).

51416123009 is a wasteful number, since it uses less digits than its factorization.

51416123009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1419390.

The product of its (nonzero) digits is 6480, while the sum is 32.

The spelling of 51416123009 in words is "fifty-one billion, four hundred sixteen million, one hundred twenty-three thousand, nine".