157809495557 has 8 divisors (see below), whose sum is σ = 180414601536. Its totient is φ = 135219612672.

The previous prime is 157809495539. The next prime is 157809495563. The reversal of 157809495557 is 755594908751.

157809495557 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 157809495557 - 2¹² = 157809491461 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 157809495493 and 157809495502.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (157809495757) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3783548 + ... + 3825029.

It is an arithmetic number, because the mean of its divisors is an integer number (22551825192).

Almost surely, 2^157809495557 is an apocalyptic number.

It is an amenable number.

157809495557 is a deficient number, since it is larger than the sum of its proper divisors (22605105979).

157809495557 is an equidigital number, since it uses as much as digits as its factorization.

157809495557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7611547.

The product of its (nonzero) digits is 79380000, while the sum is 65.

The spelling of 157809495557 in words is "one hundred fifty-seven billion, eight hundred nine million, four hundred ninety-five thousand, five hundred fifty-seven".