81546332402 has 8 divisors (see below), whose sum is σ = 122689044912. Its totient is φ = 40649984100.

The previous prime is 81546332341. The next prime is 81546332419. The reversal of 81546332402 is 20423364518.

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, 61590224 + ... + 61591547.

It is an arithmetic number, because the mean of its divisors is an integer number (15336130614).

Almost surely, 2^81546332402 is an apocalyptic number.

81546332402 is a deficient number, since it is larger than the sum of its proper divisors (41142712510).

81546332402 is a wasteful number, since it uses less digits than its factorization.

81546332402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 123182104.

The product of its (nonzero) digits is 138240, while the sum is 38.

The spelling of 81546332402 in words is "eighty-one billion, five hundred forty-six million, three hundred thirty-two thousand, four hundred two".