81228658362 has 32 divisors (see below), whose sum is σ = 167969908224. Its totient is φ = 26160288000.

The previous prime is 81228658337. The next prime is 81228658391. The reversal of 81228658362 is 26385682218.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 239139 + ... + 468662.

It is an arithmetic number, because the mean of its divisors is an integer number (5249059632).

Almost surely, 2^81228658362 is an apocalyptic number.

81228658362 is an abundant number, since it is smaller than the sum of its proper divisors (86741249862).

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

81228658362 is a wasteful number, since it uses less digits than its factorization.

81228658362 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 708454.

The product of its digits is 2211840, while the sum is 51.

The spelling of 81228658362 in words is "eighty-one billion, two hundred twenty-eight million, six hundred fifty-eight thousand, three hundred sixty-two".