81037483775 has 24 divisors (see below), whose sum is σ = 106237285200. Its totient is φ = 61149600000.

The previous prime is 81037483729. The next prime is 81037483777. The reversal of 81037483775 is 57738473018.

It is not a de Polignac number, because 81037483775 - 2¹⁰ = 81037482751 is a prime.

It is a congruent 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 23 ways as a sum of consecutive naturals, for example, 263726 + ... + 481275.

It is an arithmetic number, because the mean of its divisors is an integer number (4426553550).

Almost surely, 2^81037483775 is an apocalyptic number.

81037483775 is a deficient number, since it is larger than the sum of its proper divisors (25199801425).

81037483775 is a wasteful number, since it uses less digits than its factorization.

81037483775 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 745259 (or 745254 counting only the distinct ones).

The product of its (nonzero) digits is 3951360, while the sum is 53.

The spelling of 81037483775 in words is "eighty-one billion, thirty-seven million, four hundred eighty-three thousand, seven hundred seventy-five".