2161255001144 has 16 divisors (see below), whose sum is σ = 4128812620920. Its totient is φ = 1060238302240.

The previous prime is 2161255001141. The next prime is 2161255001179. The reversal of 2161255001144 is 4411005521612.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 2161255001144.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2161255001141) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2548649342 + ... + 2548650189.

Almost surely, 2^{2161255001144} is an apocalyptic number.

It is an amenable number.

2161255001144 is a deficient number, since it is larger than the sum of its proper divisors (1967557619776).

2161255001144 is a wasteful number, since it uses less digits than its factorization.

2161255001144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5097299590 (or 5097299586 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 32.

The spelling of 2161255001144 in words is "two trillion, one hundred sixty-one billion, two hundred fifty-five million, one thousand, one hundred forty-four".