51664055853 has 32 divisors (see below), whose sum is σ = 75065671296. Its totient is φ = 31479533568.

The previous prime is 51664055813. The next prime is 51664055869. The reversal of 51664055853 is 35855046615.

It is a happy number.

It is not a de Polignac number, because 51664055853 - 2²¹ = 51661958701 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51664055813) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 311301 + ... + 447477.

It is an arithmetic number, because the mean of its divisors is an integer number (2345802228).

Almost surely, 2^51664055853 is an apocalyptic number.

It is an amenable number.

51664055853 is a deficient number, since it is larger than the sum of its proper divisors (23401615443).

51664055853 is a wasteful number, since it uses less digits than its factorization.

51664055853 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 136413.

The product of its (nonzero) digits is 2160000, while the sum is 48.

The spelling of 51664055853 in words is "fifty-one billion, six hundred sixty-four million, fifty-five thousand, eight hundred fifty-three".