4156161660 has 144 divisors (see below), whose sum is σ = 14424883200. Its totient is φ = 948868992.

The previous prime is 4156161643. The next prime is 4156161679. The reversal of 4156161660 is 661616514.

It is a happy number.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1610251 + ... + 1612829.

It is an arithmetic number, because the mean of its divisors is an integer number (100172800).

Almost surely, 2^4156161660 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 4156161660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7212441600).

4156161660 is an abundant number, since it is smaller than the sum of its proper divisors (10268721540).

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

4156161660 is a wasteful number, since it uses less digits than its factorization.

4156161660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3880 (or 3875 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 36.

The square root of 4156161660 is about 64468.2996518444. The cubic root of 4156161660 is about 1607.7955065934.

The spelling of 4156161660 in words is "four billion, one hundred fifty-six million, one hundred sixty-one thousand, six hundred sixty".