1657828663 has 6 divisors (see below), whose sum is σ = 1671345024. Its totient is φ = 1644319656.

The previous prime is 1657828651. The next prime is 1657828673. The reversal of 1657828663 is 3668287561.

It is not a de Polignac number, because 1657828663 - 2⁵ = 1657828631 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1657828663.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1657828673) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 457045 + ... + 460657.

It is an arithmetic number, because the mean of its divisors is an integer number (278557504).

Almost surely, 2^1657828663 is an apocalyptic number.

1657828663 is a deficient number, since it is larger than the sum of its proper divisors (13516361).

1657828663 is an frugal number, since it uses more digits than its factorization.

1657828663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7353 (or 3740 counting only the distinct ones).

The product of its digits is 2903040, while the sum is 52.

The square root of 1657828663 is about 40716.4421702093. The cubic root of 1657828663 is about 1183.5316637399.

The spelling of 1657828663 in words is "one billion, six hundred fifty-seven million, eight hundred twenty-eight thousand, six hundred sixty-three".