157863932818 has 8 divisors (see below), whose sum is σ = 238385133900. Its totient is φ = 78402221520.

The previous prime is 157863932813. The next prime is 157863932851. The reversal of 157863932818 is 818239368751.

It can be written as a sum of positive squares in 2 ways, for example, as 157693969449 + 169963369 = 397107^2 + 13037^2 .

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

It is a super-2 number, since 2×157863932818² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (157863932813) 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, 264872073 + ... + 264872668.

Almost surely, 2^157863932818 is an apocalyptic number.

157863932818 is a deficient number, since it is larger than the sum of its proper divisors (80521201082).

157863932818 is a wasteful number, since it uses less digits than its factorization.

157863932818 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 529744892.

The product of its digits is 17418240, while the sum is 61.

The spelling of 157863932818 in words is "one hundred fifty-seven billion, eight hundred sixty-three million, nine hundred thirty-two thousand, eight hundred eighteen".