136400745 has 32 divisors (see below), whose sum is σ = 236476800. Its totient is φ = 67134912.

The previous prime is 136400729. The next prime is 136400749. The reversal of 136400745 is 547004631.

It is not a de Polignac number, because 136400745 - 2⁴ = 136400729 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (136400749) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 30886 + ... + 35024.

It is an arithmetic number, because the mean of its divisors is an integer number (7389900).

Almost surely, 2^136400745 is an apocalyptic number.

136400745 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

136400745 is a deficient number, since it is larger than the sum of its proper divisors (100076055).

136400745 is an equidigital number, since it uses as much as digits as its factorization.

136400745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4186 (or 4160 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 30.

The square root of 136400745 is about 11679.0729512235. The cubic root of 136400745 is about 514.7609346950.

The spelling of 136400745 in words is "one hundred thirty-six million, four hundred thousand, seven hundred forty-five".