1601117423551 has 2 divisors, whose sum is σ = 1601117423552. Its totient is φ = 1601117423550.

The previous prime is 1601117423533. The next prime is 1601117423641. The reversal of 1601117423551 is 1553247111061.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1601117423551 - 2⁵ = 1601117423519 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1601117423551.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1601117423351) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 800558711775 + 800558711776.

It is an arithmetic number, because the mean of its divisors is an integer number (800558711776).

Almost surely, 2^{1601117423551} is an apocalyptic number.

1601117423551 is a deficient number, since it is larger than the sum of its proper divisors (1).

1601117423551 is an equidigital number, since it uses as much as digits as its factorization.

1601117423551 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 25200, while the sum is 37.

The spelling of 1601117423551 in words is "one trillion, six hundred one billion, one hundred seventeen million, four hundred twenty-three thousand, five hundred fifty-one".