153430399981 has 2 divisors, whose sum is σ = 153430399982. Its totient is φ = 153430399980.

The previous prime is 153430399949. The next prime is 153430400003. The reversal of 153430399981 is 189993034351.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 147257155081 + 6173244900 = 383741^2 + 78570^2 .

It is a cyclic number.

It is not a de Polignac number, because 153430399981 - 2⁵ = 153430399949 is a prime.

It is a super-2 number, since 2×153430399981² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (153430399901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 76715199990 + 76715199991.

It is an arithmetic number, because the mean of its divisors is an integer number (76715199991).

Almost surely, 2^153430399981 is an apocalyptic number.

It is an amenable number.

153430399981 is a deficient number, since it is larger than the sum of its proper divisors (1).

153430399981 is an equidigital number, since it uses as much as digits as its factorization.

153430399981 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3149280, while the sum is 55.

The spelling of 153430399981 in words is "one hundred fifty-three billion, four hundred thirty million, three hundred ninety-nine thousand, nine hundred eighty-one".