537661611 has 8 divisors (see below), whose sum is σ = 796535760. Its totient is φ = 358441056.

The previous prime is 537661609. The next prime is 537661643. The reversal of 537661611 is 116166735.

537661611 is a `hidden beast` number, since 5 + 37 + 6 + 6 + 1 + 611 = 666.

It is not a de Polignac number, because 537661611 - 2¹ = 537661609 is a prime.

It is not an unprimeable number, because it can be changed into a prime (537661651) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9956670 + ... + 9956723.

It is an arithmetic number, because the mean of its divisors is an integer number (99566970).

Almost surely, 2^537661611 is an apocalyptic number.

537661611 is a deficient number, since it is larger than the sum of its proper divisors (258874149).

537661611 is a wasteful number, since it uses less digits than its factorization.

537661611 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19913402 (or 19913396 counting only the distinct ones).

The product of its digits is 22680, while the sum is 36.

The square root of 537661611 is about 23187.5313692510. The cubic root of 537661611 is about 813.1481463665.

The spelling of 537661611 in words is "five hundred thirty-seven million, six hundred sixty-one thousand, six hundred eleven".