1679920564 has 24 divisors (see below), whose sum is σ = 3362724288. Its totient is φ = 719348160.

The previous prime is 1679920559. The next prime is 1679920579. The reversal of 1679920564 is 4650299761.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 8259 + ... + 58549.

It is an arithmetic number, because the mean of its divisors is an integer number (140113512).

Almost surely, 2^1679920564 is an apocalyptic number.

1679920564 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

1679920564 is an abundant number, since it is smaller than the sum of its proper divisors (1682803724).

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

1679920564 is a wasteful number, since it uses less digits than its factorization.

1679920564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51495 (or 51493 counting only the distinct ones).

The product of its (nonzero) digits is 816480, while the sum is 49.

The square root of 1679920564 is about 40986.8340324061. The cubic root of 1679920564 is about 1188.7656536944.

The spelling of 1679920564 in words is "one billion, six hundred seventy-nine million, nine hundred twenty thousand, five hundred sixty-four".