1656808538 has 32 divisors (see below), whose sum is σ = 3102382080. Its totient is φ = 644690160.

The previous prime is 1656808537. The next prime is 1656808583. The reversal of 1656808538 is 8358086561.

It is not an unprimeable number, because it can be changed into a prime (1656808537) 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 15 ways as a sum of consecutive naturals, for example, 122795 + ... + 135617.

It is an arithmetic number, because the mean of its divisors is an integer number (96949440).

Almost surely, 2^1656808538 is an apocalyptic number.

1656808538 is a deficient number, since it is larger than the sum of its proper divisors (1445573542).

1656808538 is a wasteful number, since it uses less digits than its factorization.

1656808538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13682.

The product of its (nonzero) digits is 1382400, while the sum is 50.

The square root of 1656808538 is about 40703.9130551351. The cubic root of 1656808538 is about 1183.2888565884.

The spelling of 1656808538 in words is "one billion, six hundred fifty-six million, eight hundred eight thousand, five hundred thirty-eight".