1685520608537 has 8 divisors (see below), whose sum is σ = 1761379245504. Its totient is φ = 1609876565968.

The previous prime is 1685520608531. The next prime is 1685520608539. The reversal of 1685520608537 is 7358060255861.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1685520608537 - 2⁴ = 1685520608521 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1685520608531) 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, 53632538 + ... + 53663955.

It is an arithmetic number, because the mean of its divisors is an integer number (220172405688).

Almost surely, 2^{1685520608537} is an apocalyptic number.

It is an amenable number.

1685520608537 is a deficient number, since it is larger than the sum of its proper divisors (75858636967).

1685520608537 is a wasteful number, since it uses less digits than its factorization.

1685520608537 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107297199.

The product of its (nonzero) digits is 12096000, while the sum is 56.

The spelling of 1685520608537 in words is "one trillion, six hundred eighty-five billion, five hundred twenty million, six hundred eight thousand, five hundred thirty-seven".