153120663521 has 4 divisors (see below), whose sum is σ = 174995044032. Its totient is φ = 131246283012.

The previous prime is 153120663517. The next prime is 153120663523. The reversal of 153120663521 is 125366021351.

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.

It is a cyclic number.

It is not a de Polignac number, because 153120663521 - 2² = 153120663517 is a prime.

It is a super-2 number, since 2×153120663521² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (153120663523) 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, 10937190245 + ... + 10937190258.

It is an arithmetic number, because the mean of its divisors is an integer number (43748761008).

Almost surely, 2^153120663521 is an apocalyptic number.

It is an amenable number.

153120663521 is a deficient number, since it is larger than the sum of its proper divisors (21874380511).

153120663521 is an equidigital number, since it uses as much as digits as its factorization.

153120663521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21874380510.

The product of its (nonzero) digits is 32400, while the sum is 35.

Adding to 153120663521 its reverse (125366021351), we get a palindrome (278486684872).

The spelling of 153120663521 in words is "one hundred fifty-three billion, one hundred twenty million, six hundred sixty-three thousand, five hundred twenty-one".