1608397988551 has 2 divisors, whose sum is σ = 1608397988552. Its totient is φ = 1608397988550.

The previous prime is 1608397988543. The next prime is 1608397988581. The reversal of 1608397988551 is 1558897938061.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1608397988551 - 2³ = 1608397988543 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1608397988581) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 804198994275 + 804198994276.

It is an arithmetic number, because the mean of its divisors is an integer number (804198994276).

Almost surely, 2^{1608397988551} is an apocalyptic number.

1608397988551 is a deficient number, since it is larger than the sum of its proper divisors (1).

1608397988551 is an equidigital number, since it uses as much as digits as its factorization.

1608397988551 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 130636800, while the sum is 70.

The spelling of 1608397988551 in words is "one trillion, six hundred eight billion, three hundred ninety-seven million, nine hundred eighty-eight thousand, five hundred fifty-one".