73640622569 has 2 divisors, whose sum is σ = 73640622570. Its totient is φ = 73640622568.

The previous prime is 73640622563. The next prime is 73640622607. The reversal of 73640622569 is 96522604637.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 73136170969 + 504451600 = 270437^2 + 22460^2 .

It is an emirp because it is prime and its reverse (96522604637) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 73640622569 - 2¹² = 73640618473 is a prime.

It is a super-2 number, since 2×73640622569² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (73640622563) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36820311284 + 36820311285.

It is an arithmetic number, because the mean of its divisors is an integer number (36820311285).

Almost surely, 2^73640622569 is an apocalyptic number.

It is an amenable number.

73640622569 is a deficient number, since it is larger than the sum of its proper divisors (1).

73640622569 is an equidigital number, since it uses as much as digits as its factorization.

73640622569 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3265920, while the sum is 50.

The spelling of 73640622569 in words is "seventy-three billion, six hundred forty million, six hundred twenty-two thousand, five hundred sixty-nine".