11597351481 has 9 divisors (see below), whose sum is σ = 16752196591. Its totient is φ = 7731352272.

The previous prime is 11597351383. The next prime is 11597351483. The reversal of 11597351481 is 18415379511.

The square root of 11597351481 is 107691.

It is a perfect power (a square), and thus also a powerful number.

11597351481 is a `hidden beast` number, since 1 + 1 + 59 + 7 + 3 + 514 + 81 = 666.

It can be written as a sum of positive squares in only one way, i.e., 7898765625 + 3698585856 = 88875^2 + 60816^2 .

It is a tau number, because it is divible by the number of its divisors (9).

It is not a de Polignac number, because 11597351481 - 2¹⁵ = 11597318713 is a prime.

It is a super-2 number, since 2×11597351481² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (11597351483) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 305125 + ... + 341021.

Almost surely, 2^11597351481 is an apocalyptic number.

11597351481 is the 107691-st square number.

11597351481 is the 53846-th centered octagonal number.

It is an amenable number.

11597351481 is a deficient number, since it is larger than the sum of its proper divisors (5154845110).

11597351481 is an frugal number, since it uses more digits than its factorization.

11597351481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71800 (or 35900 counting only the distinct ones).

The product of its digits is 151200, while the sum is 45.

The spelling of 11597351481 in words is "eleven billion, five hundred ninety-seven million, three hundred fifty-one thousand, four hundred eighty-one".