1690686485 has 16 divisors (see below), whose sum is σ = 2070748800. Its totient is φ = 1324689600.

The previous prime is 1690686479. The next prime is 1690686523. The reversal of 1690686485 is 5846860961.

It is not a de Polignac number, because 1690686485 - 2⁴ = 1690686469 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (53).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 153410 + ... + 164060.

It is an arithmetic number, because the mean of its divisors is an integer number (129421800).

Almost surely, 2^1690686485 is an apocalyptic number.

It is an amenable number.

1690686485 is a deficient number, since it is larger than the sum of its proper divisors (380062315).

1690686485 is a wasteful number, since it uses less digits than its factorization.

1690686485 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11308.

The product of its (nonzero) digits is 2488320, while the sum is 53.

The square root of 1690686485 is about 41117.9581813105. The cubic root of 1690686485 is about 1191.2996851509.

The spelling of 1690686485 in words is "one billion, six hundred ninety million, six hundred eighty-six thousand, four hundred eighty-five".