2156181160701 has 16 divisors (see below), whose sum is σ = 3000361530240. Its totient is φ = 1374746503680.

The previous prime is 2156181160699. The next prime is 2156181160709. The reversal of 2156181160701 is 1070611816512.

It is a happy number.

It is not a de Polignac number, because 2156181160701 - 2¹ = 2156181160699 is a prime.

It is a super-2 number, since 2×2156181160701² (a number of 25 digits) contains 22 as substring.

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 2156181160701.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2156181160709) 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, 1925260 + ... + 2831781.

It is an arithmetic number, because the mean of its divisors is an integer number (187522595640).

Almost surely, 2^{2156181160701} is an apocalyptic number.

It is an amenable number.

2156181160701 is a deficient number, since it is larger than the sum of its proper divisors (844180369539).

2156181160701 is a wasteful number, since it uses less digits than its factorization.

2156181160701 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4763636.

The product of its (nonzero) digits is 20160, while the sum is 39.

The spelling of 2156181160701 in words is "two trillion, one hundred fifty-six billion, one hundred eighty-one million, one hundred sixty thousand, seven hundred one".