81296835876 has 27 divisors (see below), whose sum is σ = 205504659633. Its totient is φ = 27098375040.

The previous prime is 81296835869. The next prime is 81296835883. The reversal of 81296835876 is 67853869218.

The square root of 81296835876 is 285126.

It is a perfect power (a square), and thus also a powerful number.

It is an interprime number because it is at equal distance from previous prime (81296835869) and next prime (81296835883).

It can be written as a sum of positive squares in only one way, i.e., 72670141476 + 8626694400 = 269574^2 + 92880^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 1686996 + ... + 1734516.

Almost surely, 2^81296835876 is an apocalyptic number.

81296835876 is the 285126-th square number.

It is an amenable number.

81296835876 is an abundant number, since it is smaller than the sum of its proper divisors (124207823757).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

81296835876 is an frugal number, since it uses more digits than its factorization.

81296835876 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95052 (or 47526 counting only the distinct ones).

The product of its digits is 34836480, while the sum is 63.

The spelling of 81296835876 in words is "eighty-one billion, two hundred ninety-six million, eight hundred thirty-five thousand, eight hundred seventy-six".