153402320445581 has 2 divisors, whose sum is σ = 153402320445582. Its totient is φ = 153402320445580.

The previous prime is 153402320445559. The next prime is 153402320445587. The reversal of 153402320445581 is 185544023204351.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 149985334922500 + 3416985523081 = 12246850^2 + 1848509^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-153402320445581 is a prime.

It is a super-2 number, since 2×153402320445581² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (153402320445587) 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, 76701160222790 + 76701160222791.

It is an arithmetic number, because the mean of its divisors is an integer number (76701160222791).

Almost surely, 2^{153402320445581} is an apocalyptic number.

It is an amenable number.

153402320445581 is a deficient number, since it is larger than the sum of its proper divisors (1).

153402320445581 is an equidigital number, since it uses as much as digits as its factorization.

153402320445581 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2304000, while the sum is 47.

The spelling of 153402320445581 in words is "one hundred fifty-three trillion, four hundred two billion, three hundred twenty million, four hundred forty-five thousand, five hundred eighty-one".