538626461 has 4 divisors (see below), whose sum is σ = 539291424. Its totient is φ = 537961500.

The previous prime is 538626437. The next prime is 538626469. The reversal of 538626461 is 164626835.

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, and also an emirpimes, since its reverse is a distinct semiprime: 164626835 = 5 ⋅32925367.

It is a cyclic number.

It is not a de Polignac number, because 538626461 - 2²⁶ = 471517597 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (538626469) by changing a digit.

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 in 3 ways as a sum of consecutive naturals, for example, 331265 + ... + 332886.

It is an arithmetic number, because the mean of its divisors is an integer number (134822856).

Almost surely, 2^538626461 is an apocalyptic number.

It is an amenable number.

538626461 is a deficient number, since it is larger than the sum of its proper divisors (664963).

538626461 is an equidigital number, since it uses as much as digits as its factorization.

538626461 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 664962.

The product of its digits is 207360, while the sum is 41.

The square root of 538626461 is about 23208.3274063428. The cubic root of 538626461 is about 813.6342620021.

The spelling of 538626461 in words is "five hundred thirty-eight million, six hundred twenty-six thousand, four hundred sixty-one".