81610529763 has 8 divisors (see below), whose sum is σ = 124358902528. Its totient is φ = 46634588424.

The previous prime is 81610529603. The next prime is 81610529789. The reversal of 81610529763 is 36792501618.

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

It is not a de Polignac number, because 81610529763 - 2²¹ = 81608432611 is a prime.

It is not an unprimeable number, because it can be changed into a prime (81610529563) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1943107831 + ... + 1943107872.

It is an arithmetic number, because the mean of its divisors is an integer number (15544862816).

Almost surely, 2^81610529763 is an apocalyptic number.

81610529763 is a deficient number, since it is larger than the sum of its proper divisors (42748372765).

81610529763 is a wasteful number, since it uses less digits than its factorization.

81610529763 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3886215713.

The product of its (nonzero) digits is 544320, while the sum is 48.

The spelling of 81610529763 in words is "eighty-one billion, six hundred ten million, five hundred twenty-nine thousand, seven hundred sixty-three".