2155640614216 has 8 divisors (see below), whose sum is σ = 4041826151670. Its totient is φ = 1077820307104.

The previous prime is 2155640614213. The next prime is 2155640614229. The reversal of 2155640614216 is 6124160465512.

It can be written as a sum of positive squares in only one way, i.e., 1785307511716 + 370333102500 = 1336154^2 + 608550^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (2155640614213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 134727538381 + ... + 134727538396.

Almost surely, 2^{2155640614216} is an apocalyptic number.

It is an amenable number.

2155640614216 is a deficient number, since it is larger than the sum of its proper divisors (1886185537454).

2155640614216 is a wasteful number, since it uses less digits than its factorization.

2155640614216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 269455076783 (or 269455076779 counting only the distinct ones).

The product of its (nonzero) digits is 345600, while the sum is 43.

The spelling of 2155640614216 in words is "two trillion, one hundred fifty-five billion, six hundred forty million, six hundred fourteen thousand, two hundred sixteen".