136640450 has 24 divisors (see below), whose sum is σ = 255870900. Its totient is φ = 54286400.

The previous prime is 136640437. The next prime is 136640461. The reversal of 136640450 is 54046631.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 5148361 + 131492089 = 2269^2 + 11467^2 .

It is a super-2 number, since 2×136640450² = 37341225152405000, which contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1721 + ... + 16620.

Almost surely, 2^136640450 is an apocalyptic number.

136640450 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

136640450 is a deficient number, since it is larger than the sum of its proper divisors (119230450).

136640450 is a wasteful number, since it uses less digits than its factorization.

136640450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18502 (or 18497 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 29.

The square root of 136640450 is about 11689.3306052999. The cubic root of 136640450 is about 515.0622980533.

The spelling of 136640450 in words is "one hundred thirty-six million, six hundred forty thousand, four hundred fifty".