60705521999 has 2 divisors, whose sum is σ = 60705522000. Its totient is φ = 60705521998.

The previous prime is 60705521977. The next prime is 60705522001. The reversal of 60705521999 is 99912550706.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-60705521999 is a prime.

Together with 60705522001, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 60705521999.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (60705521939) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30352760999 + 30352761000.

It is an arithmetic number, because the mean of its divisors is an integer number (30352761000).

Almost surely, 2^60705521999 is an apocalyptic number.

60705521999 is a deficient number, since it is larger than the sum of its proper divisors (1).

60705521999 is an equidigital number, since it uses as much as digits as its factorization.

60705521999 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1530900, while the sum is 53.

The spelling of 60705521999 in words is "sixty billion, seven hundred five million, five hundred twenty-one thousand, nine hundred ninety-nine".