157972577 has 4 divisors (see below), whose sum is σ = 180540096. Its totient is φ = 135405060.

The previous prime is 157972571. The next prime is 157972589. The reversal of 157972577 is 775279751.

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: 775279751 = 5483 ⋅141397.

It is not a de Polignac number, because 157972577 - 2¹⁰ = 157971553 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (157972571) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11283749 + ... + 11283762.

It is an arithmetic number, because the mean of its divisors is an integer number (45135024).

Almost surely, 2^157972577 is an apocalyptic number.

It is an amenable number.

157972577 is a deficient number, since it is larger than the sum of its proper divisors (22567519).

157972577 is an equidigital number, since it uses as much as digits as its factorization.

157972577 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22567518.

The product of its digits is 1080450, while the sum is 50.

The square root of 157972577 is about 12568.7142142703. The cubic root of 157972577 is about 540.5807389650.

The spelling of 157972577 in words is "one hundred fifty-seven million, nine hundred seventy-two thousand, five hundred seventy-seven".