157857287293 has 4 divisors (see below), whose sum is σ = 157858599388. Its totient is φ = 157855975200.

The previous prime is 157857287279. The next prime is 157857287303. The reversal of 157857287293 is 392782758751.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 392782758751 = 1669 ⋅235340179.

It can be written as a sum of positive squares in 2 ways, for example, as 36504687844 + 121352599449 = 191062^2 + 348357^2 .

It is a cyclic number.

It is not a de Polignac number, because 157857287293 - 2⁹ = 157857286781 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 (157857287213) 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, 455058 + ... + 723043.

It is an arithmetic number, because the mean of its divisors is an integer number (39464649847).

Almost surely, 2^157857287293 is an apocalyptic number.

It is an amenable number.

157857287293 is a deficient number, since it is larger than the sum of its proper divisors (1312095).

157857287293 is a wasteful number, since it uses less digits than its factorization.

157857287293 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1312094.

The product of its digits is 59270400, while the sum is 64.

The spelling of 157857287293 in words is "one hundred fifty-seven billion, eight hundred fifty-seven million, two hundred eighty-seven thousand, two hundred ninety-three".