81228598702 has 16 divisors (see below), whose sum is σ = 122630774400. Its totient is φ = 40352415840.

The previous prime is 81228598681. The next prime is 81228598729. The reversal of 81228598702 is 20789582218.

It is a self number, because there is not a number n which added to its sum of digits gives 81228598702.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34252 + ... + 404512.

It is an arithmetic number, because the mean of its divisors is an integer number (7664423400).

Almost surely, 2^81228598702 is an apocalyptic number.

81228598702 is a deficient number, since it is larger than the sum of its proper divisors (41402175698).

81228598702 is a wasteful number, since it uses less digits than its factorization.

81228598702 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 370971.

The product of its (nonzero) digits is 1290240, while the sum is 52.

The spelling of 81228598702 in words is "eighty-one billion, two hundred twenty-eight million, five hundred ninety-eight thousand, seven hundred two".