1680537402 has 16 divisors (see below), whose sum is σ = 3734527680. Its totient is φ = 560179116.

The previous prime is 1680537379. The next prime is 1680537413. The reversal of 1680537402 is 2047350861.

1680537402 is a `hidden beast` number, since 1 + 6 + 80 + 537 + 40 + 2 = 666.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15560478 + ... + 15560585.

It is an arithmetic number, because the mean of its divisors is an integer number (233407980).

Almost surely, 2^1680537402 is an apocalyptic number.

1680537402 is an abundant number, since it is smaller than the sum of its proper divisors (2053990278).

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

1680537402 is a wasteful number, since it uses less digits than its factorization.

1680537402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31121074 (or 31121068 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 36.

The square root of 1680537402 is about 40994.3581728023. The cubic root of 1680537402 is about 1188.9111340053.

The spelling of 1680537402 in words is "one billion, six hundred eighty million, five hundred thirty-seven thousand, four hundred two".