3540638734609 has 2 divisors, whose sum is σ = 3540638734610. Its totient is φ = 3540638734608.

The previous prime is 3540638734603. The next prime is 3540638734637. The reversal of 3540638734609 is 9064378360453.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2196205441600 + 1344433293009 = 1481960^2 + 1159497^2 .

It is a cyclic number.

It is not a de Polignac number, because 3540638734609 - 2⁹ = 3540638734097 is a prime.

It is a super-2 number, since 2×3540638734609² (a number of 26 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (3540638734603) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1770319367304 + 1770319367305.

It is an arithmetic number, because the mean of its divisors is an integer number (1770319367305).

Almost surely, 2^{3540638734609} is an apocalyptic number.

It is an amenable number.

3540638734609 is a deficient number, since it is larger than the sum of its proper divisors (1).

3540638734609 is an equidigital number, since it uses as much as digits as its factorization.

3540638734609 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 39191040, while the sum is 58.

The spelling of 3540638734609 in words is "three trillion, five hundred forty billion, six hundred thirty-eight million, seven hundred thirty-four thousand, six hundred nine".