52455781813 has 8 divisors (see below), whose sum is σ = 52549361496. Its totient is φ = 52362240000.

The previous prime is 52455781787. The next prime is 52455781831. The reversal of 52455781813 is 31818755425.

It can be written as a sum of positive squares in 4 ways, for example, as 28783497649 + 23672284164 = 169657^2 + 153858^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-52455781813 is a prime.

It is a super-2 number, since 2×52455781813² (a number of 22 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 (52455781513) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4990063 + ... + 5000563.

It is an arithmetic number, because the mean of its divisors is an integer number (6568670187).

Almost surely, 2^52455781813 is an apocalyptic number.

It is an amenable number.

52455781813 is a deficient number, since it is larger than the sum of its proper divisors (93579683).

52455781813 is a wasteful number, since it uses less digits than its factorization.

52455781813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18935.

The product of its digits is 1344000, while the sum is 49.

The spelling of 52455781813 in words is "fifty-two billion, four hundred fifty-five million, seven hundred eighty-one thousand, eight hundred thirteen".