537283375661 has 4 divisors (see below), whose sum is σ = 539280711900. Its totient is φ = 535286039424.

The previous prime is 537283375649. The next prime is 537283375663. The reversal of 537283375661 is 166573382735.

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

It can be written as a sum of positive squares in 2 ways, for example, as 34877430025 + 502405945636 = 186755^2 + 708806^2 .

It is a cyclic number.

It is not a de Polignac number, because 537283375661 - 2¹⁰ = 537283374637 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 537283375597 and 537283375606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (537283375663) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 998667716 + ... + 998668253.

It is an arithmetic number, because the mean of its divisors is an integer number (134820177975).

Almost surely, 2^537283375661 is an apocalyptic number.

It is an amenable number.

537283375661 is a deficient number, since it is larger than the sum of its proper divisors (1997336239).

537283375661 is a wasteful number, since it uses less digits than its factorization.

537283375661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1997336238.

The product of its digits is 19051200, while the sum is 56.

The spelling of 537283375661 in words is "five hundred thirty-seven billion, two hundred eighty-three million, three hundred seventy-five thousand, six hundred sixty-one".