2111644142 has 4 divisors (see below), whose sum is σ = 3167466216. Its totient is φ = 1055822070.

The previous prime is 2111644141. The next prime is 2111644163. The reversal of 2111644142 is 2414461112.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2111644141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 527911034 + ... + 527911037.

It is an arithmetic number, because the mean of its divisors is an integer number (791866554).

Almost surely, 2^2111644142 is an apocalyptic number.

2111644142 is a deficient number, since it is larger than the sum of its proper divisors (1055822074).

2111644142 is a wasteful number, since it uses less digits than its factorization.

2111644142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1055822073.

The product of its digits is 1536, while the sum is 26.

The square root of 2111644142 is about 45952.6293262964. The cubic root of 2111644142 is about 1282.9416681811.

The spelling of 2111644142 in words is "two billion, one hundred eleven million, six hundred forty-four thousand, one hundred forty-two".