151599538081 has 4 divisors (see below), whose sum is σ = 155696822932. Its totient is φ = 147502253232.

The previous prime is 151599538067. The next prime is 151599538087. The reversal of 151599538081 is 180835995151.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 140913147456 + 10686390625 = 375384^2 + 103375^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-151599538081 is a prime.

It is a super-2 number, since 2×151599538081² (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 (151599538087) 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, 2048642370 + ... + 2048642443.

It is an arithmetic number, because the mean of its divisors is an integer number (38924205733).

Almost surely, 2^151599538081 is an apocalyptic number.

It is an amenable number.

151599538081 is a deficient number, since it is larger than the sum of its proper divisors (4097284851).

151599538081 is an equidigital number, since it uses as much as digits as its factorization.

151599538081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4097284850.

The product of its (nonzero) digits is 1944000, while the sum is 55.

The spelling of 151599538081 in words is "one hundred fifty-one billion, five hundred ninety-nine million, five hundred thirty-eight thousand, eighty-one".