81960192944 has 40 divisors (see below), whose sum is σ = 181818877728. Its totient is φ = 35060843520.

The previous prime is 81960192931. The next prime is 81960192949. The reversal of 81960192944 is 44929106918.

It is not an unprimeable number, because it can be changed into a prime (81960192949) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 615737 + ... + 736920.

Almost surely, 2^81960192944 is an apocalyptic number.

It is an amenable number.

81960192944 is an abundant number, since it is smaller than the sum of its proper divisors (99858684784).

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

81960192944 is a wasteful number, since it uses less digits than its factorization.

81960192944 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1353213 (or 1353207 counting only the distinct ones).

The product of its (nonzero) digits is 1119744, while the sum is 53.

The spelling of 81960192944 in words is "eighty-one billion, nine hundred sixty million, one hundred ninety-two thousand, nine hundred forty-four".