81124656041 has 32 divisors (see below), whose sum is σ = 101045683200. Its totient is φ = 64029372480.

The previous prime is 81124656031. The next prime is 81124656049. The reversal of 81124656041 is 14065642118.

It is a cyclic number.

It is not a de Polignac number, because 81124656041 - 2⁶ = 81124655977 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 81124655986 and 81124656004.

It is not an unprimeable number, because it can be changed into a prime (81124656049) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 270260 + ... + 485066.

It is an arithmetic number, because the mean of its divisors is an integer number (3157677600).

Almost surely, 2^81124656041 is an apocalyptic number.

It is an amenable number.

81124656041 is a deficient number, since it is larger than the sum of its proper divisors (19921027159).

81124656041 is a wasteful number, since it uses less digits than its factorization.

81124656041 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 214989.

The product of its (nonzero) digits is 46080, while the sum is 38.

The spelling of 81124656041 in words is "eighty-one billion, one hundred twenty-four million, six hundred fifty-six thousand, forty-one".