1679776644 has 96 divisors (see below), whose sum is σ = 4922579200. Its totient is φ = 443003904.

The previous prime is 1679776627. The next prime is 1679776729. The reversal of 1679776644 is 4466779761.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 37812 + ... + 69204.

Almost surely, 2^1679776644 is an apocalyptic number.

1679776644 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1679776644, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2461289600).

1679776644 is an abundant number, since it is smaller than the sum of its proper divisors (3242802556).

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

1679776644 is a wasteful number, since it uses less digits than its factorization.

1679776644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31434 (or 31418 counting only the distinct ones).

The product of its digits is 10668672, while the sum is 57.

The square root of 1679776644 is about 40985.0783090627. The cubic root of 1679776644 is about 1188.7317052561.

The spelling of 1679776644 in words is "one billion, six hundred seventy-nine million, seven hundred seventy-six thousand, six hundred forty-four".