81781080151010 has 64 divisors (see below), whose sum is σ = 154191284066304. Its totient is φ = 31191759244800.

The previous prime is 81781080151009. The next prime is 81781080151027. The reversal of 81781080151010 is 1015108018718.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 33986654 + ... + 36313286.

It is an arithmetic number, because the mean of its divisors is an integer number (2409238813536).

Almost surely, 2^{81781080151010} is an apocalyptic number.

81781080151010 is a deficient number, since it is larger than the sum of its proper divisors (72410203915294).

81781080151010 is a wasteful number, since it uses less digits than its factorization.

81781080151010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2328339.

The product of its (nonzero) digits is 17920, while the sum is 41.

Adding to 81781080151010 its reverse (1015108018718), we get a palindrome (82796188169728).

The spelling of 81781080151010 in words is "eighty-one trillion, seven hundred eighty-one billion, eighty million, one hundred fifty-one thousand, ten".