3773064657521 has 2 divisors, whose sum is σ = 3773064657522. Its totient is φ = 3773064657520.

The previous prime is 3773064657503. The next prime is 3773064657587. The reversal of 3773064657521 is 1257564603773.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3470415039025 + 302649618496 = 1862905^2 + 550136^2 .

It is a cyclic number.

It is not a de Polignac number, because 3773064657521 - 2²⁶ = 3772997548657 is a prime.

It is a super-2 number, since 2×3773064657521² (a number of 26 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (3773064657721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1886532328760 + 1886532328761.

It is an arithmetic number, because the mean of its divisors is an integer number (1886532328761).

Almost surely, 2^{3773064657521} is an apocalyptic number.

It is an amenable number.

3773064657521 is a deficient number, since it is larger than the sum of its proper divisors (1).

3773064657521 is an equidigital number, since it uses as much as digits as its factorization.

3773064657521 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 22226400, while the sum is 56.

The spelling of 3773064657521 in words is "three trillion, seven hundred seventy-three billion, sixty-four million, six hundred fifty-seven thousand, five hundred twenty-one".