73985522543 has 2 divisors, whose sum is σ = 73985522544. Its totient is φ = 73985522542.

The previous prime is 73985522497. The next prime is 73985522551. The reversal of 73985522543 is 34522558937.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 73985522543 - 2¹² = 73985518447 is a prime.

It is a super-2 number, since 2×73985522543² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (73985522563) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36992761271 + 36992761272.

It is an arithmetic number, because the mean of its divisors is an integer number (36992761272).

Almost surely, 2^73985522543 is an apocalyptic number.

73985522543 is a deficient number, since it is larger than the sum of its proper divisors (1).

73985522543 is an equidigital number, since it uses as much as digits as its factorization.

73985522543 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9072000, while the sum is 53.

The spelling of 73985522543 in words is "seventy-three billion, nine hundred eighty-five million, five hundred twenty-two thousand, five hundred forty-three".