81472318402 has 8 divisors (see below), whose sum is σ = 128640502800. Its totient is φ = 38592150804.

The previous prime is 81472318391. The next prime is 81472318429. The reversal of 81472318402 is 20481327418.

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1072004152 + ... + 1072004227.

It is an arithmetic number, because the mean of its divisors is an integer number (16080062850).

Almost surely, 2^81472318402 is an apocalyptic number.

81472318402 is a deficient number, since it is larger than the sum of its proper divisors (47168184398).

81472318402 is a wasteful number, since it uses less digits than its factorization.

81472318402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2144008400.

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

The spelling of 81472318402 in words is "eighty-one billion, four hundred seventy-two million, three hundred eighteen thousand, four hundred two".