81114680 has 32 divisors (see below), whose sum is σ = 185014800. Its totient is φ = 32000256.

The previous prime is 81114679. The next prime is 81114697. The reversal of 81114680 is 8641118.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10970 + ... + 16809.

Almost surely, 2^81114680 is an apocalyptic number.

It is an amenable number.

81114680 is an abundant number, since it is smaller than the sum of its proper divisors (103900120).

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

81114680 is a wasteful number, since it uses less digits than its factorization.

81114680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27863 (or 27859 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 29.

The square root of 81114680 is about 9006.3688576473. The cubic root of 81114680 is about 432.8789688521.

Adding to 81114680 its reverse (8641118), we get a palindrome (89755798).

The spelling of 81114680 in words is "eighty-one million, one hundred fourteen thousand, six hundred eighty".