1688825225531 has 2 divisors, whose sum is σ = 1688825225532. Its totient is φ = 1688825225530.

The previous prime is 1688825225443. The next prime is 1688825225597. The reversal of 1688825225531 is 1355225288861.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (1355225288861) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1688825225531 - 2¹⁸ = 1688824963387 is a prime.

It is a super-2 number, since 2×1688825225531² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1688825224531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 844412612765 + 844412612766.

It is an arithmetic number, because the mean of its divisors is an integer number (844412612766).

Almost surely, 2^{1688825225531} is an apocalyptic number.

1688825225531 is a deficient number, since it is larger than the sum of its proper divisors (1).

1688825225531 is an equidigital number, since it uses as much as digits as its factorization.

1688825225531 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9216000, while the sum is 56.

The spelling of 1688825225531 in words is "one trillion, six hundred eighty-eight billion, eight hundred twenty-five million, two hundred twenty-five thousand, five hundred thirty-one".