1656919664 has 10 divisors (see below), whose sum is σ = 3210281880. Its totient is φ = 828459824.

The previous prime is 1656919661. The next prime is 1656919673. The reversal of 1656919664 is 4669196561.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1656919661) 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 as a sum of consecutive naturals, namely, 51778724 + ... + 51778755.

It is an arithmetic number, because the mean of its divisors is an integer number (321028188).

Almost surely, 2^1656919664 is an apocalyptic number.

It is an amenable number.

1656919664 is a deficient number, since it is larger than the sum of its proper divisors (1553362216).

1656919664 is a wasteful number, since it uses less digits than its factorization.

1656919664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103557487 (or 103557481 counting only the distinct ones).

The product of its digits is 2099520, while the sum is 53.

The square root of 1656919664 is about 40705.2780852803. The cubic root of 1656919664 is about 1183.3153113083.

The spelling of 1656919664 in words is "one billion, six hundred fifty-six million, nine hundred nineteen thousand, six hundred sixty-four".