157612601521 has 4 divisors (see below), whose sum is σ = 157703551092. Its totient is φ = 157521651952.

The previous prime is 157612601519. The next prime is 157612601527. The reversal of 157612601521 is 125106216751.

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 119339157025 + 38273444496 = 345455^2 + 195636^2 .

It is a cyclic number.

It is not a de Polignac number, because 157612601521 - 2¹ = 157612601519 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (157612601527) 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, 45472186 + ... + 45475651.

It is an arithmetic number, because the mean of its divisors is an integer number (39425887773).

Almost surely, 2^157612601521 is an apocalyptic number.

It is an amenable number.

157612601521 is a deficient number, since it is larger than the sum of its proper divisors (90949571).

157612601521 is an equidigital number, since it uses as much as digits as its factorization.

157612601521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90949570.

The product of its (nonzero) digits is 25200, while the sum is 37.

The spelling of 157612601521 in words is "one hundred fifty-seven billion, six hundred twelve million, six hundred one thousand, five hundred twenty-one".