3645428981377 has 2 divisors, whose sum is σ = 3645428981378. Its totient is φ = 3645428981376.

The previous prime is 3645428981291. The next prime is 3645428981393. The reversal of 3645428981377 is 7731898245463.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3322906077456 + 322522903921 = 1822884^2 + 567911^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3645428981377 is a prime.

It is a super-3 number, since 3×3645428981377³ (a number of 39 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not a weakly prime, because it can be changed into another prime (3645428987377) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1822714490688 + 1822714490689.

It is an arithmetic number, because the mean of its divisors is an integer number (1822714490689).

Almost surely, 2^{3645428981377} is an apocalyptic number.

It is an amenable number.

3645428981377 is a deficient number, since it is larger than the sum of its proper divisors (1).

3645428981377 is an equidigital number, since it uses as much as digits as its factorization.

3645428981377 is an evil number, because the sum of its binary digits is even.

The product of its digits is 243855360, while the sum is 67.

The spelling of 3645428981377 in words is "three trillion, six hundred forty-five billion, four hundred twenty-eight million, nine hundred eighty-one thousand, three hundred seventy-seven".