51646411605 has 64 divisors (see below), whose sum is σ = 86049619200. Its totient is φ = 26419599360.

The previous prime is 51646411571. The next prime is 51646411633. The reversal of 51646411605 is 50611464615.

It is a happy number.

51646411605 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 51646411605 - 2¹¹ = 51646409557 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 58889427 + ... + 58890303.

It is an arithmetic number, because the mean of its divisors is an integer number (1344525300).

Almost surely, 2^51646411605 is an apocalyptic number.

It is an amenable number.

51646411605 is a deficient number, since it is larger than the sum of its proper divisors (34403207595).

51646411605 is a wasteful number, since it uses less digits than its factorization.

51646411605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1654.

The product of its (nonzero) digits is 86400, while the sum is 39.

The spelling of 51646411605 in words is "fifty-one billion, six hundred forty-six million, four hundred eleven thousand, six hundred five".