150601551721 has 4 divisors (see below), whose sum is σ = 158527949200. Its totient is φ = 142675154244.

The previous prime is 150601551691. The next prime is 150601551731. The reversal of 150601551721 is 127155106051.

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: 127155106051 = 59 ⋅2155171289.

It is a cyclic number.

It is not a de Polignac number, because 150601551721 - 2²⁹ = 150064680809 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (150601551731) 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, 3963198711 + ... + 3963198748.

It is an arithmetic number, because the mean of its divisors is an integer number (39631987300).

Almost surely, 2^150601551721 is an apocalyptic number.

It is an amenable number.

150601551721 is a deficient number, since it is larger than the sum of its proper divisors (7926397479).

150601551721 is an equidigital number, since it uses as much as digits as its factorization.

150601551721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7926397478.

The product of its (nonzero) digits is 10500, while the sum is 34.

Adding to 150601551721 its reverse (127155106051), we get a palindrome (277756657772).

The spelling of 150601551721 in words is "one hundred fifty billion, six hundred one million, five hundred fifty-one thousand, seven hundred twenty-one".