81141678963 has 20 divisors (see below), whose sum is σ = 128341742760. Its totient is φ = 50912425152.

The previous prime is 81141678949. The next prime is 81141678967. The reversal of 81141678963 is 36987614118.

It is not a de Polignac number, because 81141678963 - 2⁸ = 81141678707 is a prime.

It is a super-4 number, since 4×81141678963⁴ (a number of 45 digits) contains 4444 as substring.

It is not an unprimeable number, because it can be changed into a prime (81141678967) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 29461833 + ... + 29464586.

It is an arithmetic number, because the mean of its divisors is an integer number (6417087138).

Almost surely, 2^81141678963 is an apocalyptic number.

81141678963 is a deficient number, since it is larger than the sum of its proper divisors (47200063797).

81141678963 is a wasteful number, since it uses less digits than its factorization.

81141678963 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58926448 (or 58926439 counting only the distinct ones).

The product of its digits is 1741824, while the sum is 54.

The spelling of 81141678963 in words is "eighty-one billion, one hundred forty-one million, six hundred seventy-eight thousand, nine hundred sixty-three".