1685677461 has 32 divisors (see below), whose sum is σ = 2534232960. Its totient is φ = 989447424.

The previous prime is 1685677457. The next prime is 1685677489. The reversal of 1685677461 is 1647765861.

It is a happy number.

It is not a de Polignac number, because 1685677461 - 2² = 1685677457 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1685677361) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 84895 + ... + 102851.

It is an arithmetic number, because the mean of its divisors is an integer number (79194780).

Almost surely, 2^1685677461 is an apocalyptic number.

It is an amenable number.

1685677461 is a deficient number, since it is larger than the sum of its proper divisors (848555499).

1685677461 is a wasteful number, since it uses less digits than its factorization.

1685677461 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18085.

The product of its digits is 1693440, while the sum is 51.

The square root of 1685677461 is about 41057.0025817765. The cubic root of 1685677461 is about 1190.1220271258.

The spelling of 1685677461 in words is "one billion, six hundred eighty-five million, six hundred seventy-seven thousand, four hundred sixty-one".