618027681 has 4 divisors (see below), whose sum is σ = 824036912. Its totient is φ = 412018452.

The previous prime is 618027629. The next prime is 618027701. The reversal of 618027681 is 186720816.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 618027681 - 2¹³ = 618019489 is a prime.

It is a super-2 number, since 2×618027681² = 763916428964475522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (618027281) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 103004611 + ... + 103004616.

It is an arithmetic number, because the mean of its divisors is an integer number (206009228).

Almost surely, 2^618027681 is an apocalyptic number.

It is an amenable number.

618027681 is a deficient number, since it is larger than the sum of its proper divisors (206009231).

618027681 is a wasteful number, since it uses less digits than its factorization.

618027681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 206009230.

The product of its (nonzero) digits is 32256, while the sum is 39.

The square root of 618027681 is about 24860.1625296377. The cubic root of 618027681 is about 851.7967442034.

The spelling of 618027681 in words is "six hundred eighteen million, twenty-seven thousand, six hundred eighty-one".