53815603664 has 10 divisors (see below), whose sum is σ = 104267732130. Its totient is φ = 26907801824.

The previous prime is 53815603649. The next prime is 53815603703. The reversal of 53815603664 is 46630651835.

It can be written as a sum of positive squares in only one way, i.e., 48338419600 + 5477184064 = 219860^2 + 74008^2 .

It is a super-2 number, since 2×53815603664² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1681737599 + ... + 1681737630.

It is an arithmetic number, because the mean of its divisors is an integer number (10426773213).

Almost surely, 2^53815603664 is an apocalyptic number.

It is an amenable number.

53815603664 is a deficient number, since it is larger than the sum of its proper divisors (50452128466).

53815603664 is a wasteful number, since it uses less digits than its factorization.

53815603664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3363475237 (or 3363475231 counting only the distinct ones).

The product of its (nonzero) digits is 1555200, while the sum is 47.

The spelling of 53815603664 in words is "fifty-three billion, eight hundred fifteen million, six hundred three thousand, six hundred sixty-four".