81040553710 has 32 divisors (see below), whose sum is σ = 150597667584. Its totient is φ = 31366560000.

The previous prime is 81040553663. The next prime is 81040553743. The reversal of 81040553710 is 1735504018.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4001610 + ... + 4021810.

It is an arithmetic number, because the mean of its divisors is an integer number (4706177112).

Almost surely, 2^81040553710 is an apocalyptic number.

81040553710 is a deficient number, since it is larger than the sum of its proper divisors (69557113874).

81040553710 is a wasteful number, since it uses less digits than its factorization.

81040553710 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33180.

The product of its (nonzero) digits is 16800, while the sum is 34.

The spelling of 81040553710 in words is "eighty-one billion, forty million, five hundred fifty-three thousand, seven hundred ten".