75840545447 has 2 divisors, whose sum is σ = 75840545448. Its totient is φ = 75840545446.

The previous prime is 75840545393. The next prime is 75840545507. The reversal of 75840545447 is 74454504857.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (74454504857) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 75840545447 - 2⁶ = 75840545383 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (75840545747) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37920272723 + 37920272724.

It is an arithmetic number, because the mean of its divisors is an integer number (37920272724).

Almost surely, 2^75840545447 is an apocalyptic number.

75840545447 is a deficient number, since it is larger than the sum of its proper divisors (1).

75840545447 is an equidigital number, since it uses as much as digits as its factorization.

75840545447 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12544000, while the sum is 53.

The spelling of 75840545447 in words is "seventy-five billion, eight hundred forty million, five hundred forty-five thousand, four hundred forty-seven".