1231696680 has 64 divisors (see below), whose sum is σ = 3764828160. Its totient is φ = 322253568.

The previous prime is 1231696657. The next prime is 1231696771. The reversal of 1231696680 is 866961321.

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 15 ways as a sum of consecutive naturals, for example, 90472 + ... + 103191.

It is an arithmetic number, because the mean of its divisors is an integer number (58825440).

Almost surely, 2^1231696680 is an apocalyptic number.

1231696680 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1231696680 is an abundant number, since it is smaller than the sum of its proper divisors (2533131480).

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

1231696680 is a wasteful number, since it uses less digits than its factorization.

1231696680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 193730 (or 193726 counting only the distinct ones).

The product of its (nonzero) digits is 93312, while the sum is 42.

The square root of 1231696680 is about 35095.5364683317. The cubic root of 1231696680 is about 1071.9336972619.

The spelling of 1231696680 in words is "one billion, two hundred thirty-one million, six hundred ninety-six thousand, six hundred eighty".