181351648642 has 16 divisors (see below), whose sum is σ = 281018513664. Its totient is φ = 87683310000.

The previous prime is 181351648589. The next prime is 181351648657. The reversal of 181351648642 is 246846153181.

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 7 ways as a sum of consecutive naturals, for example, 1043484 + ... + 1204807.

It is an arithmetic number, because the mean of its divisors is an integer number (17563657104).

Almost surely, 2^181351648642 is an apocalyptic number.

181351648642 is a deficient number, since it is larger than the sum of its proper divisors (99666865022).

181351648642 is a wasteful number, since it uses less digits than its factorization.

181351648642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2249625.

The product of its digits is 1105920, while the sum is 49.

The spelling of 181351648642 in words is "one hundred eighty-one billion, three hundred fifty-one million, six hundred forty-eight thousand, six hundred forty-two".