3643261627651 has 2 divisors, whose sum is σ = 3643261627652. Its totient is φ = 3643261627650.

The previous prime is 3643261627637. The next prime is 3643261627769. The reversal of 3643261627651 is 1567261623463.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 3643261627651 - 2¹¹ = 3643261625603 is a prime.

It is not a weakly prime, because it can be changed into another prime (3643268627651) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1821630813825 + 1821630813826.

It is an arithmetic number, because the mean of its divisors is an integer number (1821630813826).

Almost surely, 2^{3643261627651} is an apocalyptic number.

3643261627651 is a deficient number, since it is larger than the sum of its proper divisors (1).

3643261627651 is an equidigital number, since it uses as much as digits as its factorization.

3643261627651 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6531840, while the sum is 52.

The spelling of 3643261627651 in words is "three trillion, six hundred forty-three billion, two hundred sixty-one million, six hundred twenty-seven thousand, six hundred fifty-one".