3645428981291 has 2 divisors, whose sum is σ = 3645428981292. Its totient is φ = 3645428981290.

The previous prime is 3645428981287. The next prime is 3645428981377. The reversal of 3645428981291 is 1921898245463.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 3645428981291 - 2² = 3645428981287 is a prime.

It is a super-3 number, since 3×3645428981291³ (a number of 39 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (3645428981231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1822714490645 + 1822714490646.

It is an arithmetic number, because the mean of its divisors is an integer number (1822714490646).

Almost surely, 2^{3645428981291} is an apocalyptic number.

3645428981291 is a deficient number, since it is larger than the sum of its proper divisors (1).

3645428981291 is an equidigital number, since it uses as much as digits as its factorization.

3645428981291 is an evil number, because the sum of its binary digits is even.

The product of its digits is 29859840, while the sum is 62.

The spelling of 3645428981291 in words is "three trillion, six hundred forty-five billion, four hundred twenty-eight million, nine hundred eighty-one thousand, two hundred ninety-one".