81035424778 has 32 divisors (see below), whose sum is σ = 154771181568. Its totient is φ = 30900490800.

The previous prime is 81035424733. The next prime is 81035424779. The reversal of 81035424778 is 87742453018.

It is not an unprimeable number, because it can be changed into a prime (81035424779) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 5590678 + ... + 5605153.

It is an arithmetic number, because the mean of its divisors is an integer number (4836599424).

Almost surely, 2^81035424778 is an apocalyptic number.

81035424778 is a deficient number, since it is larger than the sum of its proper divisors (73735756790).

81035424778 is a wasteful number, since it uses less digits than its factorization.

81035424778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11195898.

The product of its (nonzero) digits is 1505280, while the sum is 49.

The spelling of 81035424778 in words is "eighty-one billion, thirty-five million, four hundred twenty-four thousand, seven hundred seventy-eight".