538651659 has 64 divisors (see below), whose sum is σ = 916966400. Its totient is φ = 279417600.

The previous prime is 538651643. The next prime is 538651679. The reversal of 538651659 is 956156835.

It is a happy number.

It is not a de Polignac number, because 538651659 - 2⁴ = 538651643 is a prime.

It is a Smith number, since the sum of its digits (48) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (538651609) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 895959 + ... + 896559.

It is an arithmetic number, because the mean of its divisors is an integer number (14327600).

Almost surely, 2^538651659 is an apocalyptic number.

538651659 is a deficient number, since it is larger than the sum of its proper divisors (378314741).

538651659 is a wasteful number, since it uses less digits than its factorization.

538651659 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 705 (or 691 counting only the distinct ones).

The product of its digits is 972000, while the sum is 48.

The square root of 538651659 is about 23208.8702654825. The cubic root of 538651659 is about 813.6469496053.

The spelling of 538651659 in words is "five hundred thirty-eight million, six hundred fifty-one thousand, six hundred fifty-nine".