40531144579 has 2 divisors, whose sum is σ = 40531144580. Its totient is φ = 40531144578.

The previous prime is 40531144523. The next prime is 40531144583. The reversal of 40531144579 is 97544113504.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 40531144579 - 2²⁹ = 39994273667 is a prime.

It is not a weakly prime, because it can be changed into another prime (40531144279) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20265572289 + 20265572290.

It is an arithmetic number, because the mean of its divisors is an integer number (20265572290).

Almost surely, 2^40531144579 is an apocalyptic number.

40531144579 is a deficient number, since it is larger than the sum of its proper divisors (1).

40531144579 is an equidigital number, since it uses as much as digits as its factorization.

40531144579 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 302400, while the sum is 43.

The spelling of 40531144579 in words is "forty billion, five hundred thirty-one million, one hundred forty-four thousand, five hundred seventy-nine".