18597078379489 has 3 divisors (see below), whose sum is σ = 18597082691923. Its totient is φ = 18597074067056.

The previous prime is 18597078379463. The next prime is 18597078379513. The reversal of 18597078379489 is 98497387079581.

The square root of 18597078379489 is 4312433.

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

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 9040274957025 + 9556803422464 = 3006705^2 + 3091408^2 .

It is not a de Polignac number, because 18597078379489 - 2³⁷ = 18459639426017 is a prime.

It is a super-2 number, since 2×18597078379489² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18597078379189) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 2156217 + ... + 6468649.

Almost surely, 2^{18597078379489} is an apocalyptic number.

18597078379489 is the 4312433-rd square number.

18597078379489 is the 2156217-th centered octagonal number.

It is an amenable number.

18597078379489 is a deficient number, since it is larger than the sum of its proper divisors (4312434).

18597078379489 is an frugal number, since it uses more digits than its factorization.

18597078379489 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8624866 (or 4312433 counting only the distinct ones).

The product of its (nonzero) digits is 7681443840, while the sum is 85.

The spelling of 18597078379489 in words is "eighteen trillion, five hundred ninety-seven billion, seventy-eight million, three hundred seventy-nine thousand, four hundred eighty-nine".