157570609 has 4 divisors (see below), whose sum is σ = 180080704. Its totient is φ = 135060516.

The previous prime is 157570597. The next prime is 157570627. The reversal of 157570609 is 906075751.

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: 906075751 = 7 ⋅129439393.

It is a cyclic number.

It is not a de Polignac number, because 157570609 - 2¹³ = 157562417 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (157570669) 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, 11255037 + ... + 11255050.

It is an arithmetic number, because the mean of its divisors is an integer number (45020176).

Almost surely, 2^157570609 is an apocalyptic number.

It is an amenable number.

157570609 is a deficient number, since it is larger than the sum of its proper divisors (22510095).

157570609 is an equidigital number, since it uses as much as digits as its factorization.

157570609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22510094.

The product of its (nonzero) digits is 66150, while the sum is 40.

The square root of 157570609 is about 12552.7132126883. The cubic root of 157570609 is about 540.1218392200.

The spelling of 157570609 in words is "one hundred fifty-seven million, five hundred seventy thousand, six hundred nine".