1656620562 has 32 divisors (see below), whose sum is σ = 3386529792. Its totient is φ = 540011664.

The previous prime is 1656620549. The next prime is 1656620569. The reversal of 1656620562 is 2650266561.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 1656620562.

It is not an unprimeable number, because it can be changed into a prime (1656620569) 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, 660603 + ... + 663105.

It is an arithmetic number, because the mean of its divisors is an integer number (105829056).

Almost surely, 2^1656620562 is an apocalyptic number.

1656620562 is an abundant number, since it is smaller than the sum of its proper divisors (1729909230).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1656620562 is a wasteful number, since it uses less digits than its factorization.

1656620562 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4902.

The product of its (nonzero) digits is 129600, while the sum is 39.

The square root of 1656620562 is about 40701.6039241699. The cubic root of 1656620562 is about 1183.2441042199.

It can be divided in two parts, 16566 and 20562, that added together give a triangular number (37128 = T₂₇₂).

The spelling of 1656620562 in words is "one billion, six hundred fifty-six million, six hundred twenty thousand, five hundred sixty-two".