81952803076 has 9 divisors (see below), whose sum is σ = 143418407349. Its totient is φ = 40976115264.

The previous prime is 81952803071. The next prime is 81952803077. The reversal of 81952803076 is 67030825918.

The square root of 81952803076 is 286274.

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

It can be written as a sum of positive squares in only one way, i.e., 56100100 + 81896702976 = 7490^2 + 286176^2 .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (81952803071) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 500980 + ... + 644116.

Almost surely, 2^81952803076 is an apocalyptic number.

81952803076 is the 286274-th square number.

It is an amenable number.

81952803076 is a deficient number, since it is larger than the sum of its proper divisors (61465604273).

81952803076 is an frugal number, since it uses more digits than its factorization.

81952803076 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 286278 (or 143139 counting only the distinct ones).

The product of its (nonzero) digits is 725760, while the sum is 49.

Multiplying 81952803076 by its sum of digits (49), we get a square (4015687350724 = 2003918²).

The spelling of 81952803076 in words is "eighty-one billion, nine hundred fifty-two million, eight hundred three thousand, seventy-six".