136257818 has 8 divisors (see below), whose sum is σ = 205758900. Its totient is φ = 67671520.

The previous prime is 136257799. The next prime is 136257827. The reversal of 136257818 is 818752631.

It can be written as a sum of positive squares in 2 ways, for example, as 113571649 + 22686169 = 10657^2 + 4763^2 .

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

It is a super-2 number, since 2×136257818² = 37132385932242248, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 228323 + ... + 228918.

Almost surely, 2^136257818 is an apocalyptic number.

136257818 is a deficient number, since it is larger than the sum of its proper divisors (69501082).

136257818 is a wasteful number, since it uses less digits than its factorization.

136257818 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 457392.

The product of its digits is 80640, while the sum is 41.

The square root of 136257818 is about 11672.9524114510. The cubic root of 136257818 is about 514.5810750985.

The spelling of 136257818 in words is "one hundred thirty-six million, two hundred fifty-seven thousand, eight hundred eighteen".