1685793081 has 16 divisors (see below), whose sum is σ = 2569451904. Its totient is φ = 963076224.

The previous prime is 1685793071. The next prime is 1685793103. The reversal of 1685793081 is 1803975861.

It is not a de Polignac number, because 1685793081 - 2²² = 1681598777 is a prime.

It is a super-2 number, since 2×1685793081² = 5683796623894945122, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1685793081.

It is not an unprimeable number, because it can be changed into a prime (1685793041) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 117031 + ... + 130643.

It is an arithmetic number, because the mean of its divisors is an integer number (160590744).

Almost surely, 2^1685793081 is an apocalyptic number.

It is an amenable number.

1685793081 is a deficient number, since it is larger than the sum of its proper divisors (883658823).

1685793081 is a wasteful number, since it uses less digits than its factorization.

1685793081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19520.

The product of its (nonzero) digits is 362880, while the sum is 48.

The square root of 1685793081 is about 41058.4106000220. The cubic root of 1685793081 is about 1190.1492365151.

The spelling of 1685793081 in words is "one billion, six hundred eighty-five million, seven hundred ninety-three thousand, eighty-one".