153987523553 has 4 divisors (see below), whose sum is σ = 154067270448. Its totient is φ = 153907776660.

The previous prime is 153987523531. The next prime is 153987523567. The reversal of 153987523553 is 355325789351.

It is a happy number.

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: 355325789351 = 13 ⋅27332753027.

It is a cyclic number.

It is not a de Polignac number, because 153987523553 - 2⁸ = 153987523297 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (153987523513) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 39870551 + ... + 39874412.

It is an arithmetic number, because the mean of its divisors is an integer number (38516817612).

Almost surely, 2^153987523553 is an apocalyptic number.

It is an amenable number.

153987523553 is a deficient number, since it is larger than the sum of its proper divisors (79746895).

153987523553 is an equidigital number, since it uses as much as digits as its factorization.

153987523553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79746894.

The product of its digits is 17010000, while the sum is 56.

The spelling of 153987523553 in words is "one hundred fifty-three billion, nine hundred eighty-seven million, five hundred twenty-three thousand, five hundred fifty-three".