52555391664321 has 128 divisors (see below), whose sum is σ = 93655188458496. Its totient is φ = 25424565534720.

The previous prime is 52555391664313. The next prime is 52555391664323. The reversal of 52555391664321 is 12346619355525.

It is not a de Polignac number, because 52555391664321 - 2³ = 52555391664313 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (52555391664323) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 162147795 + ... + 162471591.

It is an arithmetic number, because the mean of its divisors is an integer number (731681159832).

Almost surely, 2^{52555391664321} is an apocalyptic number.

52555391664321 is a gapful number since it is divisible by the number (51) formed by its first and last digit.

It is an amenable number.

52555391664321 is a deficient number, since it is larger than the sum of its proper divisors (41099796794175).

52555391664321 is a wasteful number, since it uses less digits than its factorization.

52555391664321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 324731.

The product of its digits is 29160000, while the sum is 57.

The spelling of 52555391664321 in words is "fifty-two trillion, five hundred fifty-five billion, three hundred ninety-one million, six hundred sixty-four thousand, three hundred twenty-one".