181870655061 has 16 divisors (see below), whose sum is σ = 243911606400. Its totient is φ = 120540103680.

The previous prime is 181870655053. The next prime is 181870655111. The reversal of 181870655061 is 160556078181.

It is a happy number.

It is not a de Polignac number, because 181870655061 - 2³ = 181870655053 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 181870655061.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (181870605061) 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, 216640 + ... + 640838.

It is an arithmetic number, because the mean of its divisors is an integer number (15244475400).

Almost surely, 2^181870655061 is an apocalyptic number.

It is an amenable number.

181870655061 is a deficient number, since it is larger than the sum of its proper divisors (62040951339).

181870655061 is a wasteful number, since it uses less digits than its factorization.

181870655061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 425036.

The product of its (nonzero) digits is 403200, while the sum is 48.

The spelling of 181870655061 in words is "one hundred eighty-one billion, eight hundred seventy million, six hundred fifty-five thousand, sixty-one".