52555391668439 has 4 divisors (see below), whose sum is σ = 57333154547400. Its totient is φ = 47777628789480.

The previous prime is 52555391668363. The next prime is 52555391668457. The reversal of 52555391668439 is 93486619355525.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-52555391668439 is a prime.

It is a super-2 number, since 2×52555391668439² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (52555391661439) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2388881439464 + ... + 2388881439485.

It is an arithmetic number, because the mean of its divisors is an integer number (14333288636850).

Almost surely, 2^{52555391668439} is an apocalyptic number.

52555391668439 is a deficient number, since it is larger than the sum of its proper divisors (4777762878961).

52555391668439 is a wasteful number, since it uses less digits than its factorization.

52555391668439 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4777762878960.

The product of its digits is 1049760000, while the sum is 71.

The spelling of 52555391668439 in words is "fifty-two trillion, five hundred fifty-five billion, three hundred ninety-one million, six hundred sixty-eight thousand, four hundred thirty-nine".