157831330557 has 4 divisors (see below), whose sum is σ = 210441774080. Its totient is φ = 105220887036.

The previous prime is 157831330477. The next prime is 157831330621. The reversal of 157831330557 is 755033138751.

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 not a de Polignac number, because 157831330557 - 2¹⁹ = 157830806269 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (157831330157) 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, 26305221757 + ... + 26305221762.

It is an arithmetic number, because the mean of its divisors is an integer number (52610443520).

Almost surely, 2^157831330557 is an apocalyptic number.

It is an amenable number.

157831330557 is a deficient number, since it is larger than the sum of its proper divisors (52610443523).

157831330557 is an equidigital number, since it uses as much as digits as its factorization.

157831330557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52610443522.

The product of its (nonzero) digits is 1323000, while the sum is 48.

The spelling of 157831330557 in words is "one hundred fifty-seven billion, eight hundred thirty-one million, three hundred thirty thousand, five hundred fifty-seven".