81546576962 has 4 divisors (see below), whose sum is σ = 122319865446. Its totient is φ = 40773288480.

The previous prime is 81546576961. The next prime is 81546576967. The reversal of 81546576962 is 26967564518.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 81037578241 + 508998721 = 284671^2 + 22561^2 .

It is not an unprimeable number, because it can be changed into a prime (81546576961) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20386644239 + ... + 20386644242.

Almost surely, 2^81546576962 is an apocalyptic number.

81546576962 is a deficient number, since it is larger than the sum of its proper divisors (40773288484).

81546576962 is a wasteful number, since it uses less digits than its factorization.

81546576962 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40773288483.

The product of its digits is 21772800, while the sum is 59.

The spelling of 81546576962 in words is "eighty-one billion, five hundred forty-six million, five hundred seventy-six thousand, nine hundred sixty-two".