3658525738561 has 2 divisors, whose sum is σ = 3658525738562. Its totient is φ = 3658525738560.

The previous prime is 3658525738531. The next prime is 3658525738607. The reversal of 3658525738561 is 1658375258563.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2682863823025 + 975661915536 = 1637945^2 + 987756^2 .

It is a cyclic number.

It is not a de Polignac number, because 3658525738561 - 2¹⁹ = 3658525214273 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 3658525738493 and 3658525738502.

It is not a weakly prime, because it can be changed into another prime (3658525738501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1829262869280 + 1829262869281.

It is an arithmetic number, because the mean of its divisors is an integer number (1829262869281).

Almost surely, 2^{3658525738561} is an apocalyptic number.

It is an amenable number.

3658525738561 is a deficient number, since it is larger than the sum of its proper divisors (1).

3658525738561 is an equidigital number, since it uses as much as digits as its factorization.

3658525738561 is an evil number, because the sum of its binary digits is even.

The product of its digits is 181440000, while the sum is 64.

The spelling of 3658525738561 in words is "three trillion, six hundred fifty-eight billion, five hundred twenty-five million, seven hundred thirty-eight thousand, five hundred sixty-one".