73189197881 has 2 divisors, whose sum is σ = 73189197882. Its totient is φ = 73189197880.

The previous prime is 73189197859. The next prime is 73189197901. The reversal of 73189197881 is 18879198137.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 53675622400 + 19513575481 = 231680^2 + 139691^2 .

It is an emirp because it is prime and its reverse (18879198137) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 73189197881 - 2¹⁴ = 73189181497 is a prime.

It is a super-2 number, since 2×73189197881² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (73189190881) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36594598940 + 36594598941.

It is an arithmetic number, because the mean of its divisors is an integer number (36594598941).

Almost surely, 2^73189197881 is an apocalyptic number.

It is an amenable number.

73189197881 is a deficient number, since it is larger than the sum of its proper divisors (1).

73189197881 is an equidigital number, since it uses as much as digits as its factorization.

73189197881 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6096384, while the sum is 62.

The spelling of 73189197881 in words is "seventy-three billion, one hundred eighty-nine million, one hundred ninety-seven thousand, eight hundred eighty-one".