90136854577139 has 2 divisors, whose sum is σ = 90136854577140. Its totient is φ = 90136854577138.

The previous prime is 90136854577127. The next prime is 90136854577153. The reversal of 90136854577139 is 93177545863109.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 90136854577139 - 2⁴ = 90136854577123 is a prime.

It is not a weakly prime, because it can be changed into another prime (90136854571139) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45068427288569 + 45068427288570.

It is an arithmetic number, because the mean of its divisors is an integer number (45068427288570).

Almost surely, 2^{90136854577139} is an apocalyptic number.

90136854577139 is a deficient number, since it is larger than the sum of its proper divisors (1).

90136854577139 is an equidigital number, since it uses as much as digits as its factorization.

90136854577139 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 171460800, while the sum is 68.

The spelling of 90136854577139 in words is "ninety trillion, one hundred thirty-six billion, eight hundred fifty-four million, five hundred seventy-seven thousand, one hundred thirty-nine".