3557401685 has 4 divisors (see below), whose sum is σ = 4268882028. Its totient is φ = 2845921344.

The previous prime is 3557401681. The next prime is 3557401709. The reversal of 3557401685 is 5861047553.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1595443249 + 1961958436 = 39943^2 + 44294^2 .

It is a cyclic number.

It is not a de Polignac number, because 3557401685 - 2² = 3557401681 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3557401681) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 355740164 + ... + 355740173.

It is an arithmetic number, because the mean of its divisors is an integer number (1067220507).

Almost surely, 2^3557401685 is an apocalyptic number.

It is an amenable number.

3557401685 is a deficient number, since it is larger than the sum of its proper divisors (711480343).

3557401685 is an equidigital number, since it uses as much as digits as its factorization.

3557401685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 711480342.

The product of its (nonzero) digits is 504000, while the sum is 44.

The square root of 3557401685 is about 59643.9576570838. The cubic root of 3557401685 is about 1526.5497723649.

The spelling of 3557401685 in words is "three billion, five hundred fifty-seven million, four hundred one thousand, six hundred eighty-five".