1691825485 has 16 divisors (see below), whose sum is σ = 2321424000. Its totient is φ = 1159505856.

The previous prime is 1691825483. The next prime is 1691825501. The reversal of 1691825485 is 5845281961.

It is a cyclic number.

It is not a de Polignac number, because 1691825485 - 2¹ = 1691825483 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1691825483) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 61951 + ... + 84979.

It is an arithmetic number, because the mean of its divisors is an integer number (145089000).

Almost surely, 2^1691825485 is an apocalyptic number.

It is an amenable number.

1691825485 is a deficient number, since it is larger than the sum of its proper divisors (629598515).

1691825485 is a wasteful number, since it uses less digits than its factorization.

1691825485 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25140.

The product of its digits is 691200, while the sum is 49.

The square root of 1691825485 is about 41131.8062452891. The cubic root of 1691825485 is about 1191.5671476598.

The spelling of 1691825485 in words is "one billion, six hundred ninety-one million, eight hundred twenty-five thousand, four hundred eighty-five".