136781445 has 8 divisors (see below), whose sum is σ = 218850336. Its totient is φ = 72950096.

The previous prime is 136781443. The next prime is 136781497. The reversal of 136781445 is 544187631.

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

It is a cyclic number.

It is not a de Polignac number, because 136781445 - 2¹ = 136781443 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (136781443) 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, 4559367 + ... + 4559396.

It is an arithmetic number, because the mean of its divisors is an integer number (27356292).

Almost surely, 2^136781445 is an apocalyptic number.

136781445 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

136781445 is a deficient number, since it is larger than the sum of its proper divisors (82068891).

136781445 is an equidigital number, since it uses as much as digits as its factorization.

136781445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9118771.

The product of its digits is 80640, while the sum is 39.

The square root of 136781445 is about 11695.3599773585. The cubic root of 136781445 is about 515.2393960368.

The spelling of 136781445 in words is "one hundred thirty-six million, seven hundred eighty-one thousand, four hundred forty-five".