3643263256553 has 2 divisors, whose sum is σ = 3643263256554. Its totient is φ = 3643263256552.

The previous prime is 3643263256519. The next prime is 3643263256583. The reversal of 3643263256553 is 3556523623463.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2854653543184 + 788609713369 = 1689572^2 + 888037^2 .

It is a cyclic number.

It is not a de Polignac number, because 3643263256553 - 2¹⁶ = 3643263191017 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 3643263256495 and 3643263256504.

It is not a weakly prime, because it can be changed into another prime (3643263256513) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1821631628276 + 1821631628277.

It is an arithmetic number, because the mean of its divisors is an integer number (1821631628277).

Almost surely, 2^{3643263256553} is an apocalyptic number.

It is an amenable number.

3643263256553 is a deficient number, since it is larger than the sum of its proper divisors (1).

3643263256553 is an equidigital number, since it uses as much as digits as its factorization.

3643263256553 is an evil number, because the sum of its binary digits is even.

The product of its digits is 34992000, while the sum is 53.

The spelling of 3643263256553 in words is "three trillion, six hundred forty-three billion, two hundred sixty-three million, two hundred fifty-six thousand, five hundred fifty-three".