81037483771 has 4 divisors (see below), whose sum is σ = 81080114544. Its totient is φ = 80994853000.

The previous prime is 81037483729. The next prime is 81037483777. The reversal of 81037483771 is 17738473018.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 81037483771 - 2⁹ = 81037483259 is a prime.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (81037483777) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21312535 + ... + 21316336.

It is an arithmetic number, because the mean of its divisors is an integer number (20270028636).

Almost surely, 2^81037483771 is an apocalyptic number.

81037483771 is a deficient number, since it is larger than the sum of its proper divisors (42630773).

81037483771 is a wasteful number, since it uses less digits than its factorization.

81037483771 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42630772.

The product of its (nonzero) digits is 790272, while the sum is 49.

The spelling of 81037483771 in words is "eighty-one billion, thirty-seven million, four hundred eighty-three thousand, seven hundred seventy-one".