51613635605 has 8 divisors (see below), whose sum is σ = 70784414592. Its totient is φ = 35392207248.

The previous prime is 51613635589. The next prime is 51613635643. The reversal of 51613635605 is 50653631615.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 51613635605 - 2⁴ = 51613635589 is a prime.

It is a Duffinian number.

It is a Curzon number.

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 7 ways as a sum of consecutive naturals, for example, 737337617 + ... + 737337686.

It is an arithmetic number, because the mean of its divisors is an integer number (8848051824).

Almost surely, 2^51613635605 is an apocalyptic number.

It is an amenable number.

51613635605 is a deficient number, since it is larger than the sum of its proper divisors (19170778987).

51613635605 is a wasteful number, since it uses less digits than its factorization.

51613635605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1474675315.

The product of its (nonzero) digits is 243000, while the sum is 41.

The spelling of 51613635605 in words is "fifty-one billion, six hundred thirteen million, six hundred thirty-five thousand, six hundred five".