7271789881 has 8 divisors (see below), whose sum is σ = 7320263240. Its totient is φ = 7223344128.

The previous prime is 7271789821. The next prime is 7271789893. The reversal of 7271789881 is 1889871727.

It can be written as a sum of positive squares in 4 ways, for example, as 234090000 + 7037699881 = 15300^2 + 83891^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 7271789881 - 2¹¹ = 7271787833 is a prime.

It is a super-2 number, since 2×7271789881² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7271789821) 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 7 ways as a sum of consecutive naturals, for example, 991255 + ... + 998563.

It is an arithmetic number, because the mean of its divisors is an integer number (915032905).

Almost surely, 2^7271789881 is an apocalyptic number.

It is an amenable number.

7271789881 is a deficient number, since it is larger than the sum of its proper divisors (48473359).

7271789881 is a wasteful number, since it uses less digits than its factorization.

7271789881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13803.

The product of its digits is 3161088, while the sum is 58.

The square root of 7271789881 is about 85274.7904189744. The cubic root of 7271789881 is about 1937.3753681662.

The spelling of 7271789881 in words is "seven billion, two hundred seventy-one million, seven hundred eighty-nine thousand, eight hundred eighty-one".