1685653722 has 12 divisors (see below), whose sum is σ = 3652249770. Its totient is φ = 561884568.

The previous prime is 1685653709. The next prime is 1685653769. The reversal of 1685653722 is 2273565861.

1685653722 is a `hidden beast` number, since 1 + 68 + 56 + 537 + 2 + 2 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1454583321 + 231070401 = 38139^2 + 15201^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 46823697 + ... + 46823732.

Almost surely, 2^1685653722 is an apocalyptic number.

1685653722 is an abundant number, since it is smaller than the sum of its proper divisors (1966596048).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1685653722 is a wasteful number, since it uses less digits than its factorization.

1685653722 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93647437 (or 93647434 counting only the distinct ones).

The product of its digits is 604800, while the sum is 45.

The square root of 1685653722 is about 41056.7134826937. The cubic root of 1685653722 is about 1190.1164403632.

The spelling of 1685653722 in words is "one billion, six hundred eighty-five million, six hundred fifty-three thousand, seven hundred twenty-two".