136421566 has 32 divisors (see below), whose sum is σ = 221110560. Its totient is φ = 62899200.

The previous prime is 136421563. The next prime is 136421573. The reversal of 136421566 is 665124631.

It is a super-2 number, since 2×136421566² = 37221687339784712, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (34).

Its product of digits (25920) is a multiple of the sum of its prime divisors (540).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (136421563) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 485346 + ... + 485626.

It is an arithmetic number, because the mean of its divisors is an integer number (6909705).

Almost surely, 2^136421566 is an apocalyptic number.

136421566 is a deficient number, since it is larger than the sum of its proper divisors (84688994).

136421566 is a wasteful number, since it uses less digits than its factorization.

136421566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 540.

The product of its digits is 25920, while the sum is 34.

The square root of 136421566 is about 11679.9642978906. The cubic root of 136421566 is about 514.7871253930.

The spelling of 136421566 in words is "one hundred thirty-six million, four hundred twenty-one thousand, five hundred sixty-six".