51649622804 has 96 divisors (see below), whose sum is σ = 102627332640. Its totient is φ = 22579200000.

The previous prime is 51649622803. The next prime is 51649622807. The reversal of 51649622804 is 40822694615.

It can be written as a sum of positive squares in 16 ways, for example, as 15984544900 + 35665077904 = 126430^2 + 188852^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51649622803) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 17209304 + ... + 17212304.

It is an arithmetic number, because the mean of its divisors is an integer number (1069034715).

Almost surely, 2^51649622804 is an apocalyptic number.

It is an amenable number.

51649622804 is a deficient number, since it is larger than the sum of its proper divisors (50977709836).

51649622804 is a wasteful number, since it uses less digits than its factorization.

51649622804 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3261 (or 3259 counting only the distinct ones).

The product of its (nonzero) digits is 829440, while the sum is 47.

The spelling of 51649622804 in words is "fifty-one billion, six hundred forty-nine million, six hundred twenty-two thousand, eight hundred four".