136581552 has 60 divisors (see below), whose sum is σ = 396406920. Its totient is φ = 45525888.

The previous prime is 136581551. The next prime is 136581589. The reversal of 136581552 is 255185631.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (136581551) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 13677 + ... + 21452.

It is an arithmetic number, because the mean of its divisors is an integer number (6606782).

Almost surely, 2^136581552 is an apocalyptic number.

136581552 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

136581552 is an abundant number, since it is smaller than the sum of its proper divisors (259825368).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

136581552 is an equidigital number, since it uses as much as digits as its factorization.

136581552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35152 (or 35134 counting only the distinct ones).

The product of its digits is 36000, while the sum is 36.

The square root of 136581552 is about 11686.8110278211. The cubic root of 136581552 is about 514.9882826379.

The spelling of 136581552 in words is "one hundred thirty-six million, five hundred eighty-one thousand, five hundred fifty-two".