1656742063 has 8 divisors (see below), whose sum is σ = 1705687200. Its totient is φ = 1608203520.

The previous prime is 1656742039. The next prime is 1656742093. The reversal of 1656742063 is 3602476561.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1656742063 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 (1656742013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 93370 + ... + 109687.

It is an arithmetic number, because the mean of its divisors is an integer number (213210900).

Almost surely, 2^1656742063 is an apocalyptic number.

1656742063 is a deficient number, since it is larger than the sum of its proper divisors (48945137).

1656742063 is a wasteful number, since it uses less digits than its factorization.

1656742063 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 203297.

The product of its (nonzero) digits is 181440, while the sum is 40.

The square root of 1656742063 is about 40703.0964792606. The cubic root of 1656742063 is about 1183.2730309459.

The spelling of 1656742063 in words is "one billion, six hundred fifty-six million, seven hundred forty-two thousand, sixty-three".