81714784498 has 8 divisors (see below), whose sum is σ = 123696692460. Its totient is φ = 40482553680.

The previous prime is 81714784439. The next prime is 81714784499. The reversal of 81714784498 is 89448741718.

It can be written as a sum of positive squares in 2 ways, for example, as 79474939569 + 2239844929 = 281913^2 + 47327^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×81714784498² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (81714784499) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 187419013 + ... + 187419448.

Almost surely, 2^81714784498 is an apocalyptic number.

81714784498 is a deficient number, since it is larger than the sum of its proper divisors (41981907962).

81714784498 is a wasteful number, since it uses less digits than its factorization.

81714784498 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 374838572.

The product of its digits is 14450688, while the sum is 61.

The spelling of 81714784498 in words is "eighty-one billion, seven hundred fourteen million, seven hundred eighty-four thousand, four hundred ninety-eight".