71623511040989 has 2 divisors, whose sum is σ = 71623511040990. Its totient is φ = 71623511040988.

The previous prime is 71623511040953. The next prime is 71623511041007. The reversal of 71623511040989 is 98904011532617.

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., 70735534635364 + 887976405625 = 8410442^2 + 942325^2 .

It is a cyclic number.

It is not a de Polignac number, because 71623511040989 - 2¹² = 71623511036893 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (71623511040689) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35811755520494 + 35811755520495.

It is an arithmetic number, because the mean of its divisors is an integer number (35811755520495).

It is a 1-persistent number, because it is pandigital, but 2⋅71623511040989 = 143247022081978 is not.

Almost surely, 2^{71623511040989} is an apocalyptic number.

It is an amenable number.

71623511040989 is a deficient number, since it is larger than the sum of its proper divisors (1).

71623511040989 is an equidigital number, since it uses as much as digits as its factorization.

71623511040989 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 56.

The spelling of 71623511040989 in words is "seventy-one trillion, six hundred twenty-three billion, five hundred eleven million, forty thousand, nine hundred eighty-nine".