51510605606 has 4 divisors (see below), whose sum is σ = 77265908412. Its totient is φ = 25755302802.

The previous prime is 51510605599. The next prime is 51510605723. The reversal of 51510605606 is 60650601515.

It is a semiprime because it is the product of two primes.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12877651400 + ... + 12877651403.

It is an arithmetic number, because the mean of its divisors is an integer number (19316477103).

Almost surely, 2^51510605606 is an apocalyptic number.

51510605606 is a deficient number, since it is larger than the sum of its proper divisors (25755302806).

51510605606 is a wasteful number, since it uses less digits than its factorization.

51510605606 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25755302805.

The product of its (nonzero) digits is 27000, while the sum is 35.

The spelling of 51510605606 in words is "fifty-one billion, five hundred ten million, six hundred five thousand, six hundred six".