157559409 has 24 divisors (see below), whose sum is σ = 262634112. Its totient is φ = 89156160.

The previous prime is 157559387. The next prime is 157559429. The reversal of 157559409 is 904955751.

157559409 is a `hidden beast` number, since 1 + 57 + 5 + 594 + 0 + 9 = 666.

It is not a de Polignac number, because 157559409 - 2¹⁹ = 157035121 is a prime.

It is not an unprimeable number, because it can be changed into a prime (157559429) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5652 + ... + 18629.

It is an arithmetic number, because the mean of its divisors is an integer number (10943088).

Almost surely, 2^157559409 is an apocalyptic number.

It is an amenable number.

157559409 is a deficient number, since it is larger than the sum of its proper divisors (105074703).

157559409 is a wasteful number, since it uses less digits than its factorization.

157559409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24397 (or 24394 counting only the distinct ones).

The product of its (nonzero) digits is 283500, while the sum is 45.

The square root of 157559409 is about 12552.2670860686. The cubic root of 157559409 is about 540.1090417658.

The spelling of 157559409 in words is "one hundred fifty-seven million, five hundred fifty-nine thousand, four hundred nine".