145171313857 has 4 divisors (see below), whose sum is σ = 146528055216. Its totient is φ = 143814572500.

The previous prime is 145171313839. The next prime is 145171313869. The reversal of 145171313857 is 758313171541.

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, and also an emirpimes, since its reverse is a distinct semiprime: 758313171541 = 31 ⋅24461715211.

It is a cyclic number.

It is not a de Polignac number, because 145171313857 - 2³⁵ = 110811575489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (145171313887) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 678370519 + ... + 678370732.

It is an arithmetic number, because the mean of its divisors is an integer number (36632013804).

Almost surely, 2^145171313857 is an apocalyptic number.

It is an amenable number.

145171313857 is a deficient number, since it is larger than the sum of its proper divisors (1356741359).

145171313857 is a wasteful number, since it uses less digits than its factorization.

145171313857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1356741358.

The product of its digits is 352800, while the sum is 46.

The spelling of 145171313857 in words is "one hundred forty-five billion, one hundred seventy-one million, three hundred thirteen thousand, eight hundred fifty-seven".