81033410078 has 8 divisors (see below), whose sum is σ = 121558005072. Its totient is φ = 40514075056.

The previous prime is 81033410053. The next prime is 81033410113. The reversal of 81033410078 is 87001433018.

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

It is a congruent number.

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, 1276250 + ... + 1338237.

It is an arithmetic number, because the mean of its divisors is an integer number (15194750634).

Almost surely, 2^81033410078 is an apocalyptic number.

81033410078 is a deficient number, since it is larger than the sum of its proper divisors (40524594994).

81033410078 is a wasteful number, since it uses less digits than its factorization.

81033410078 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2629986.

The product of its (nonzero) digits is 16128, while the sum is 35.

The spelling of 81033410078 in words is "eighty-one billion, thirty-three million, four hundred ten thousand, seventy-eight".