537538561 has 16 divisors (see below), whose sum is σ = 626984064. Its totient is φ = 451286784.

The previous prime is 537538531. The next prime is 537538579. The reversal of 537538561 is 165835735.

It is a cyclic number.

It is not a de Polignac number, because 537538561 - 2⁷ = 537538433 is a prime.

Its product of digits (378000) is a multiple of the sum of its prime divisors (2520).

It is not an unprimeable number, because it can be changed into a prime (537538501) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 361726 + ... + 363208.

It is an arithmetic number, because the mean of its divisors is an integer number (39186504).

Almost surely, 2^537538561 is an apocalyptic number.

It is an amenable number.

537538561 is a deficient number, since it is larger than the sum of its proper divisors (89445503).

537538561 is a wasteful number, since it uses less digits than its factorization.

537538561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2520.

The product of its digits is 378000, while the sum is 43.

The square root of 537538561 is about 23184.8778517378. The cubic root of 537538561 is about 813.0861088870.

The spelling of 537538561 in words is "five hundred thirty-seven million, five hundred thirty-eight thousand, five hundred sixty-one".