157872342917 has 4 divisors (see below), whose sum is σ = 158051540556. Its totient is φ = 157693145280.

The previous prime is 157872342911. The next prime is 157872342983. The reversal of 157872342917 is 719243278751.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 719243278751 = 149 ⋅4827136099.

It can be written as a sum of positive squares in 2 ways, for example, as 16737631876 + 141134711041 = 129374^2 + 375679^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-157872342917 is a prime.

It is a super-3 number, since 3×157872342917³ (a number of 35 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (157872342911) 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, 89597498 + ... + 89599259.

It is an arithmetic number, because the mean of its divisors is an integer number (39512885139).

Almost surely, 2^157872342917 is an apocalyptic number.

It is an amenable number.

157872342917 is a deficient number, since it is larger than the sum of its proper divisors (179197639).

157872342917 is an equidigital number, since it uses as much as digits as its factorization.

157872342917 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 179197638.

The product of its digits is 5927040, while the sum is 56.

The spelling of 157872342917 in words is "one hundred fifty-seven billion, eight hundred seventy-two million, three hundred forty-two thousand, nine hundred seventeen".