538681645 has 8 divisors (see below), whose sum is σ = 654600960. Its totient is φ = 425490000.

The previous prime is 538681613. The next prime is 538681679. The reversal of 538681645 is 546186835.

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

It is not a de Polignac number, because 538681645 - 2⁵ = 538681613 is a prime.

It is a super-3 number, since 3×538681645³ (a number of 27 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 538681595 and 538681604.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 681481 + ... + 682270.

It is an arithmetic number, because the mean of its divisors is an integer number (81825120).

Almost surely, 2^538681645 is an apocalyptic number.

It is an amenable number.

538681645 is a deficient number, since it is larger than the sum of its proper divisors (115919315).

538681645 is a wasteful number, since it uses less digits than its factorization.

538681645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1363835.

The product of its digits is 691200, while the sum is 46.

The square root of 538681645 is about 23209.5162595001. The cubic root of 538681645 is about 813.6620475288.

The spelling of 538681645 in words is "five hundred thirty-eight million, six hundred eighty-one thousand, six hundred forty-five".