51690636254 has 8 divisors (see below), whose sum is σ = 82096892928. Its totient is φ = 24325005280.

The previous prime is 51690636191. The next prime is 51690636269. The reversal of 51690636254 is 45263609615.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 51690636199 and 51690636208.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 760156382 + ... + 760156449.

It is an arithmetic number, because the mean of its divisors is an integer number (10262111616).

Almost surely, 2^51690636254 is an apocalyptic number.

51690636254 is a deficient number, since it is larger than the sum of its proper divisors (30406256674).

51690636254 is a wasteful number, since it uses less digits than its factorization.

51690636254 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1520312850.

The product of its (nonzero) digits is 1166400, while the sum is 47.

The spelling of 51690636254 in words is "fifty-one billion, six hundred ninety million, six hundred thirty-six thousand, two hundred fifty-four".