151001616721 has 4 divisors (see below), whose sum is σ = 152820913392. Its totient is φ = 149182320052.

The previous prime is 151001616719. The next prime is 151001616743. The reversal of 151001616721 is 127616100151.

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 151001616721 - 2¹ = 151001616719 is a prime.

It is not an unprimeable number, because it can be changed into a prime (151001616791) 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, 909648211 + ... + 909648376.

It is an arithmetic number, because the mean of its divisors is an integer number (38205228348).

Almost surely, 2^151001616721 is an apocalyptic number.

It is an amenable number.

151001616721 is a deficient number, since it is larger than the sum of its proper divisors (1819296671).

151001616721 is an equidigital number, since it uses as much as digits as its factorization.

151001616721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1819296670.

The product of its (nonzero) digits is 2520, while the sum is 31.

Adding to 151001616721 its reverse (127616100151), we get a palindrome (278617716872).

The spelling of 151001616721 in words is "one hundred fifty-one billion, one million, six hundred sixteen thousand, seven hundred twenty-one".