51005605061 has 4 divisors (see below), whose sum is σ = 51372552000. Its totient is φ = 50638658124.

The previous prime is 51005605031. The next prime is 51005605093. The reversal of 51005605061 is 16050650015.

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 51005605061 - 2⁶ = 51005604997 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 (51005605031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 183473261 + ... + 183473538.

It is an arithmetic number, because the mean of its divisors is an integer number (12843138000).

Almost surely, 2^51005605061 is an apocalyptic number.

It is an amenable number.

51005605061 is a deficient number, since it is larger than the sum of its proper divisors (366946939).

51005605061 is a wasteful number, since it uses less digits than its factorization.

51005605061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 366946938.

The product of its (nonzero) digits is 4500, while the sum is 29.

The spelling of 51005605061 in words is "fifty-one billion, five million, six hundred five thousand, sixty-one".