1656032285 has 4 divisors (see below), whose sum is σ = 1987238748. Its totient is φ = 1324825824.

The previous prime is 1656032281. The next prime is 1656032291. The reversal of 1656032285 is 5822306561.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5822306561 = 47 ⋅123878863.

It can be written as a sum of positive squares in 2 ways, for example, as 184389241 + 1471643044 = 13579^2 + 38362^2 .

It is a cyclic number.

It is not a de Polignac number, because 1656032285 - 2² = 1656032281 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 (1656032281) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 165603224 + ... + 165603233.

It is an arithmetic number, because the mean of its divisors is an integer number (496809687).

Almost surely, 2^1656032285 is an apocalyptic number.

It is an amenable number.

1656032285 is a deficient number, since it is larger than the sum of its proper divisors (331206463).

1656032285 is an equidigital number, since it uses as much as digits as its factorization.

1656032285 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 331206462.

The product of its (nonzero) digits is 86400, while the sum is 38.

The square root of 1656032285 is about 40694.3765771144. The cubic root of 1656032285 is about 1183.1040283494.

The spelling of 1656032285 in words is "one billion, six hundred fifty-six million, thirty-two thousand, two hundred eighty-five".