680181651 has 16 divisors (see below), whose sum is σ = 1009631520. Its totient is φ = 452574720.

The previous prime is 680181643. The next prime is 680181653. The reversal of 680181651 is 156181086.

It is not a de Polignac number, because 680181651 - 2³ = 680181643 is a prime.

It is not an unprimeable number, because it can be changed into a prime (680181653) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10110 + ... + 38243.

It is an arithmetic number, because the mean of its divisors is an integer number (63101970).

Almost surely, 2^680181651 is an apocalyptic number.

680181651 is a deficient number, since it is larger than the sum of its proper divisors (329449869).

680181651 is a wasteful number, since it uses less digits than its factorization.

680181651 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48883 (or 48877 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 36.

The square root of 680181651 is about 26080.2923871647. The cubic root of 680181651 is about 879.4442302550. Note that the first 3 decimals are identical.

The spelling of 680181651 in words is "six hundred eighty million, one hundred eighty-one thousand, six hundred fifty-one".