40547680143521 has 2 divisors, whose sum is σ = 40547680143522. Its totient is φ = 40547680143520.

The previous prime is 40547680143511. The next prime is 40547680143563. The reversal of 40547680143521 is 12534108674504.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 40171955278225 + 375724865296 = 6338135^2 + 612964^2 .

It is a cyclic number.

It is not a de Polignac number, because 40547680143521 - 2²² = 40547675949217 is a prime.

It is a super-2 number, since 2×40547680143521² (a number of 28 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 40547680143521.

It is not a weakly prime, because it can be changed into another prime (40547680143511) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20273840071760 + 20273840071761.

It is an arithmetic number, because the mean of its divisors is an integer number (20273840071761).

Almost surely, 2^{40547680143521} is an apocalyptic number.

It is an amenable number.

40547680143521 is a deficient number, since it is larger than the sum of its proper divisors (1).

40547680143521 is an equidigital number, since it uses as much as digits as its factorization.

40547680143521 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3225600, while the sum is 50.

The spelling of 40547680143521 in words is "forty trillion, five hundred forty-seven billion, six hundred eighty million, one hundred forty-three thousand, five hundred twenty-one".