153960891217 has 4 divisors (see below), whose sum is σ = 175955304256. Its totient is φ = 131966478180.

The previous prime is 153960891209. The next prime is 153960891223. The reversal of 153960891217 is 712198069351.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 712198069351 = 241 ⋅2955178711.

It is a cyclic number.

It is not a de Polignac number, because 153960891217 - 2³ = 153960891209 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (153960891277) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10997206509 + ... + 10997206522.

It is an arithmetic number, because the mean of its divisors is an integer number (43988826064).

Almost surely, 2^153960891217 is an apocalyptic number.

It is an amenable number.

153960891217 is a deficient number, since it is larger than the sum of its proper divisors (21994413039).

153960891217 is an equidigital number, since it uses as much as digits as its factorization.

153960891217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21994413038.

The product of its (nonzero) digits is 816480, while the sum is 52.

The spelling of 153960891217 in words is "one hundred fifty-three billion, nine hundred sixty million, eight hundred ninety-one thousand, two hundred seventeen".