81418702234 has 8 divisors (see below), whose sum is σ = 122157643860. Its totient is φ = 40699487616.

The previous prime is 81418702223. The next prime is 81418702243. The reversal of 81418702234 is 43220781418.

It can be written as a sum of positive squares in 2 ways, for example, as 76841503209 + 4577199025 = 277203^2 + 67655^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4921429 + ... + 4937944.

Almost surely, 2^81418702234 is an apocalyptic number.

81418702234 is a deficient number, since it is larger than the sum of its proper divisors (40738941626).

81418702234 is a wasteful number, since it uses less digits than its factorization.

81418702234 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9863504.

The product of its (nonzero) digits is 86016, while the sum is 40.

The spelling of 81418702234 in words is "eighty-one billion, four hundred eighteen million, seven hundred two thousand, two hundred thirty-four".