1680344379 has 64 divisors (see below), whose sum is σ = 3049159680. Its totient is φ = 892684800.

The previous prime is 1680344353. The next prime is 1680344387. The reversal of 1680344379 is 9734430861.

It is not a de Polignac number, because 1680344379 - 2⁷ = 1680344251 is a prime.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (1680345379) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 263529 + ... + 269829.

It is an arithmetic number, because the mean of its divisors is an integer number (47643120).

Almost surely, 2^1680344379 is an apocalyptic number.

1680344379 is a deficient number, since it is larger than the sum of its proper divisors (1368815301).

1680344379 is a wasteful number, since it uses less digits than its factorization.

1680344379 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6417 (or 6411 counting only the distinct ones).

The product of its (nonzero) digits is 435456, while the sum is 45.

The square root of 1680344379 is about 40992.0038422129. The cubic root of 1680344379 is about 1188.8656136497.

The spelling of 1680344379 in words is "one billion, six hundred eighty million, three hundred forty-four thousand, three hundred seventy-nine".