157279437218 has 4 divisors (see below), whose sum is σ = 235919155830. Its totient is φ = 78639718608.

The previous prime is 157279437197. The next prime is 157279437283. The reversal of 157279437218 is 812734972751.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 111317651449 + 45961785769 = 333643^2 + 214387^2 .

It is a super-2 number, since 2×157279437218² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 39319859303 + ... + 39319859306.

Almost surely, 2^157279437218 is an apocalyptic number.

157279437218 is a deficient number, since it is larger than the sum of its proper divisors (78639718612).

157279437218 is an equidigital number, since it uses as much as digits as its factorization.

157279437218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78639718611.

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

The spelling of 157279437218 in words is "one hundred fifty-seven billion, two hundred seventy-nine million, four hundred thirty-seven thousand, two hundred eighteen".