727988953869 has 10 divisors (see below), whose sum is σ = 1087489671950. Its totient is φ = 485325969192.

The previous prime is 727988953823. The next prime is 727988953873. The reversal of 727988953869 is 968359889727.

727988953869 is a `hidden beast` number, since 7 + 2 + 79 + 8 + 8 + 9 + 538 + 6 + 9 = 666.

It can be written as a sum of positive squares in only one way, i.e., 550905372900 + 177083580969 = 742230^2 + 420813^2 .

It is not a de Polignac number, because 727988953869 - 2¹² = 727988949773 is a prime.

It is a super-2 number, since 2×727988953869² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (81), and also a Moran number because the ratio is a prime number: 8987517949 = 727988953869 / (7 + 2 + 7 + 9 + 8 + 8 + 9 + 5 + 3 + 8 + 6 + 9).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (727988951869) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 4493758894 + ... + 4493759055.

It is an arithmetic number, because the mean of its divisors is an integer number (108748967195).

Almost surely, 2^727988953869 is an apocalyptic number.

It is an amenable number.

727988953869 is a deficient number, since it is larger than the sum of its proper divisors (359500718081).

727988953869 is an equidigital number, since it uses as much as digits as its factorization.

727988953869 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8987517961 (or 8987517952 counting only the distinct ones).

The product of its digits is 3292047360, while the sum is 81.

The spelling of 727988953869 in words is "seven hundred twenty-seven billion, nine hundred eighty-eight million, nine hundred fifty-three thousand, eight hundred sixty-nine".