136640451 has 8 divisors (see below), whose sum is σ = 184683280. Its totient is φ = 89845632.

The previous prime is 136640437. The next prime is 136640461. The reversal of 136640451 is 154046631.

136640451 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 136640451 - 2⁷ = 136640323 is a prime.

It is a super-2 number, since 2×136640451² = 37341225698966802, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (136640461) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 311746 + ... + 312183.

It is an arithmetic number, because the mean of its divisors is an integer number (23085410).

Almost surely, 2^136640451 is an apocalyptic number.

136640451 is a deficient number, since it is larger than the sum of its proper divisors (48042829).

136640451 is an equidigital number, since it uses as much as digits as its factorization.

136640451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 624005.

The product of its (nonzero) digits is 8640, while the sum is 30.

The square root of 136640451 is about 11689.3306480739. The cubic root of 136640451 is about 515.0622993098.

The spelling of 136640451 in words is "one hundred thirty-six million, six hundred forty thousand, four hundred fifty-one".