68136180 has 48 divisors (see below), whose sum is σ = 218037120. Its totient is φ = 15573888.

The previous prime is 68136169. The next prime is 68136181. The reversal of 68136180 is 8163186.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68136181) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 80695 + ... + 81534.

It is an arithmetic number, because the mean of its divisors is an integer number (4542440).

Almost surely, 2^68136180 is an apocalyptic number.

68136180 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

68136180 is an abundant number, since it is smaller than the sum of its proper divisors (149900940).

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

68136180 is a wasteful number, since it uses less digits than its factorization.

68136180 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 162248 (or 162246 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 33.

The square root of 68136180 is about 8254.4642466971. The cubic root of 68136180 is about 408.4377989926.

The spelling of 68136180 in words is "sixty-eight million, one hundred thirty-six thousand, one hundred eighty".