81038071510 has 32 divisors (see below), whose sum is σ = 159928992000. Its totient is φ = 29320299360.

The previous prime is 81038071427. The next prime is 81038071643. The reversal of 81038071510 is 1517083018.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1829140 + ... + 1872919.

It is an arithmetic number, because the mean of its divisors is an integer number (4997781000).

Almost surely, 2^81038071510 is an apocalyptic number.

81038071510 is a deficient number, since it is larger than the sum of its proper divisors (78890920490).

81038071510 is a wasteful number, since it uses less digits than its factorization.

81038071510 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3702276.

The product of its (nonzero) digits is 6720, while the sum is 34.

The spelling of 81038071510 in words is "eighty-one billion, thirty-eight million, seventy-one thousand, five hundred ten".