51641106646 has 16 divisors (see below), whose sum is σ = 78855871680. Its totient is φ = 25356719560.

The previous prime is 51641106641. The next prime is 51641106739. The reversal of 51641106646 is 64660114615.

It is a junction number, because it is equal to n+sod(n) for n = 51641106599 and 51641106608.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51641106641) by changing a digit.

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, 110776 + ... + 339931.

It is an arithmetic number, because the mean of its divisors is an integer number (4928491980).

Almost surely, 2^51641106646 is an apocalyptic number.

51641106646 is a deficient number, since it is larger than the sum of its proper divisors (27214765034).

51641106646 is a wasteful number, since it uses less digits than its factorization.

51641106646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 451739.

The product of its (nonzero) digits is 103680, while the sum is 40.

The spelling of 51641106646 in words is "fifty-one billion, six hundred forty-one million, one hundred six thousand, six hundred forty-six".