136749678 has 64 divisors (see below), whose sum is σ = 307105344. Its totient is φ = 40320000.

The previous prime is 136749673. The next prime is 136749709. The reversal of 136749678 is 876947631.

It is a self number, because there is not a number n which added to its sum of digits gives 136749678.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (136749673) 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, 194728 + ... + 195428.

It is an arithmetic number, because the mean of its divisors is an integer number (4798521).

Almost surely, 2^136749678 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 136749678, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (153552672).

136749678 is an abundant number, since it is smaller than the sum of its proper divisors (170355666).

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

136749678 is a wasteful number, since it uses less digits than its factorization.

136749678 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 821.

The product of its digits is 1524096, while the sum is 51.

The square root of 136749678 is about 11694.0017957926. The cubic root of 136749678 is about 515.1995054480.

The spelling of 136749678 in words is "one hundred thirty-six million, seven hundred forty-nine thousand, six hundred seventy-eight".