537698218 has 4 divisors (see below), whose sum is σ = 806547330. Its totient is φ = 268849108.

The previous prime is 537698207. The next prime is 537698261. The reversal of 537698218 is 812896735.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 340660849 + 197037369 = 18457^2 + 14037^2 .

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 134424553 + ... + 134424556.

Almost surely, 2^537698218 is an apocalyptic number.

537698218 is a deficient number, since it is larger than the sum of its proper divisors (268849112).

537698218 is a wasteful number, since it uses less digits than its factorization.

537698218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 268849111.

The product of its digits is 725760, while the sum is 49.

The square root of 537698218 is about 23188.3207240197. The cubic root of 537698218 is about 813.1666005008.

The spelling of 537698218 in words is "five hundred thirty-seven million, six hundred ninety-eight thousand, two hundred eighteen".