157557849 has 4 divisors (see below), whose sum is σ = 210077136. Its totient is φ = 105038564.

The previous prime is 157557839. The next prime is 157557863. The reversal of 157557849 is 948755751.

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.

It is a cyclic number.

It is not a de Polignac number, because 157557849 - 2⁴ = 157557833 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (157557839) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26259639 + ... + 26259644.

It is an arithmetic number, because the mean of its divisors is an integer number (52519284).

Almost surely, 2^157557849 is an apocalyptic number.

It is an amenable number.

157557849 is a deficient number, since it is larger than the sum of its proper divisors (52519287).

157557849 is an equidigital number, since it uses as much as digits as its factorization.

157557849 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52519286.

The product of its digits is 1764000, while the sum is 51.

The square root of 157557849 is about 12552.2049457456. The cubic root of 157557849 is about 540.1072592151.

The spelling of 157557849 in words is "one hundred fifty-seven million, five hundred fifty-seven thousand, eight hundred forty-nine".