64845877741 has 2 divisors, whose sum is σ = 64845877742. Its totient is φ = 64845877740.

The previous prime is 64845877739. The next prime is 64845877757. The reversal of 64845877741 is 14777854846.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 60974424900 + 3871452841 = 246930^2 + 62221^2 .

It is a cyclic number.

It is not a de Polignac number, because 64845877741 - 2¹ = 64845877739 is a prime.

Together with 64845877739, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 64845877741.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64845877771) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32422938870 + 32422938871.

It is an arithmetic number, because the mean of its divisors is an integer number (32422938871).

Almost surely, 2^64845877741 is an apocalyptic number.

It is an amenable number.

64845877741 is a deficient number, since it is larger than the sum of its proper divisors (1).

64845877741 is an equidigital number, since it uses as much as digits as its factorization.

64845877741 is an evil number, because the sum of its binary digits is even.

The product of its digits is 42147840, while the sum is 61.

The spelling of 64845877741 in words is "sixty-four billion, eight hundred forty-five million, eight hundred seventy-seven thousand, seven hundred forty-one".