60640436512421 has 2 divisors, whose sum is σ = 60640436512422. Its totient is φ = 60640436512420.

The previous prime is 60640436512351. The next prime is 60640436512423. The reversal of 60640436512421 is 12421563404606.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 37166275852225 + 23474160660196 = 6096415^2 + 4845014^2 .

It is a cyclic number.

It is not a de Polignac number, because 60640436512421 - 2²⁶ = 60640369403557 is a prime.

Together with 60640436512423, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (60640436512423) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30320218256210 + 30320218256211.

It is an arithmetic number, because the mean of its divisors is an integer number (30320218256211).

Almost surely, 2^{60640436512421} is an apocalyptic number.

It is an amenable number.

60640436512421 is a deficient number, since it is larger than the sum of its proper divisors (1).

60640436512421 is an equidigital number, since it uses as much as digits as its factorization.

60640436512421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 829440, while the sum is 44.

The spelling of 60640436512421 in words is "sixty trillion, six hundred forty billion, four hundred thirty-six million, five hundred twelve thousand, four hundred twenty-one".